NCERT Solutions for Class 9 Maths CBSE

NCERT Solutions for Class 9 Maths Chapter 1 Number System

This chapter briefly takes into account the conceptual knowledge of a student from previous grades. The student will have an in-depth understanding of the real number system by performing various operations on it. It will also involve revision of rational and irrational numbers along with natural numbers, whole numbers, and integers. The use of number line enables a prim and proper understanding that builds a strong foundation of CBSE Class 9 Maths

These basic concepts lead to decimal expansion and rationalisation. The student will be able to find out whether the given decimal is non-terminating repeating or terminating and will be able to rationalise the irrational numbers with TopperLearning’s NCERT solutions for Class 9 Maths.

The chapter has six exercises as mentioned below. Each question is solved with an apt approach by our subject experts. The solutions are self-explanatory and provide complete clarity.

The numbers which can be represented in the form of p/q, where q ≠ o  and p and q are integers are called rational numbers. Rational numbers are denoted by Q. If p and q are co-prime then the rational number is in its simplest form. All-natural numbers, whole numbers and integer are rational number. Equivalent rational numbers (or fractions) have same (equal) values when written in the simplest form. Rational number between two numbers x and y = x+y/2 .

There are infinitely many rational numbers between any two given rational numbers. The numbers which are not of the form of p/q, where q ≠ 0 and p and q are integers are called irrational numbers. For example: √2, √7, 𝛑 etc. Rational and irrational numbers together constitute are called real numbers. The collection of real numbers is denoted by R.

Irrational number between two numbers x and y 

 

Chapter 1 - Number Systems Exercise Ex. 1.1

There are four questions in this exercise. This exercise can also be called a recap of previous knowledge, with some new concepts. Students should be able to list the rational numbers between any two natural numbers. Our subject experts have solved these questions in an elaborate manner. Students can tally their solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 1 - Number Systems Exercise Ex. 1.2

Irrational numbers is a tricky concept to comprehend. TopperLearning makes it simpler for all students by solving all four questions in this exercise. These questions are about understanding the scope of different types of numbers and playing the irrational numbers on the number line. Each solution has a concept insight, which makes it simpler to learn CBSE Class 9 Maths. Check your solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 1 - Number Systems Exercise Ex. 1.3

The focus in this exercise is on rational and irrational numbers along with decimal expansion. The process of representation of real numbers on the number line using their decimal expansions is thoroughly discussed. This exercise has nine questions with some sub-questions as well. Our subject experts have not only provided with the solutions but have also given you a concept insight for understanding why and how the answer is obtained. Students will be more familiar and shall be able to distinguish between rationals and irrationals with TopperLearning’s class 9th maths ncert solutions. Use our doubt solver "Ask a Doubt" feature and get your queries resolved.

Chapter 1 - Number Systems Exercise Ex. 1.4 

This part focuses on the process of successive magnification and how real numbers are placed on the number line using successive magnification. There are only two questions in this exercise. A stepwise approach is best for making a Class 9 Maths student understand this concept. Our subject experts have used the same technique to provide you with the solutions.

Chapter 1 - Number Systems Exercise Ex. 1.5

This exercise targets performing different operations on real numbers to infer if they follow the basic laws of Maths. The reference of these properties and operations lays the ground base of understanding advanced academic Maths. This exercise comprises 5 questions with some sub-questions. Our subject experts understand what may puzzle the students and hence with each solution, there is a reason or property associated to provide clarity. Our experts will help you with your doubts with our doubt solver "Ask a Doubt".

Chapter 1 - Number Systems Exercise Ex. 1.6

The concept of Laws of Exponents from the lower grades is revised in this exercise. The operation of laws of exponents on real numbers is analysed and assessed with only three questions and some sub-questions. Each of these questions is solved in an elaborated manner accompanied by some formulae from the previous grades for quick revision. This is the last exercise of this chapter after which the student shall have a thorough foundation of the number system.

NCERT Number Systems Class 9 Videos

NCERT Number Systems Class 9 Revision Notes

NCERT Number Systems Class 9 Most Important Questions

NCERT Number Systems Class 9 MCQ

NCERT Number Systems Class 9 FIB

NCERT Number Systems Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Rational numbers

Class 9 Maths- Irrational numbers

Class 9 Maths- Real numbers

Class 9 Maths- Laws of exponents

Class 9 Maths- Representation on number line

This indeed is a great kick start for the CBSE syllabus for class 9 Maths. Get your doubts quickly resolved using our doubt solver "Ask a Doubt".

NCERT Solutions for Class 9 Maths Chapter 2 Polynomials

NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry

This chapter recaps your basics about algebraic expressions. Polynomial is a specific type of algebraic expression and so this chapter involves all the terminologies and various operations on it. Our video solutions will be an excellent resort for this chapter from CBSE Class 9 Maths.

A polynomialp(x) in one variable x is an algebraic expression in x of the form

p(x) = a_nxⁿ + a_n-1x^n-1 + a_n-2x^n-2 + ...... + a₂x² + a₁x  + a₀, where

a_0,a_1, a_2.......a_n  are constants

x is a variable

a_0,a_1, a_2.......a_n are respectively the coefficients of xⁱ

Each of a_nxⁿ + a_n-1x^n-1 + a_n-2x^n-2 + ...... + a₂x², a₁x, a₀ with a_n ≠ is called a term of a polynomial.

Division algorithm

If p(x) and g(x) are the two polynomials such that degree of p(x) ≥ degree of g(x) and g(x) ≠ 0, then we can find polynomials q(x) and r(x) such that:

p (x) = g(x) q(x) + r(x)

where, r(x) =0 or degree of r(x) < degree of g(x).

Remainder theorem

Let p(x) be any polynomial of degree greater than or equal to one and let a be any real number. If p(x) is divided by the linear polynomial (x – a), then remainder is p(a).

If the polynomial p(x) is divided by (x + a), the remainder is given by the value of p(-a).

Factor theorem

Let p(x) is a polynomial of degree n ≥ 1 and a is any real number such that p(a) = 0, then (x - a) is a factor of p(x).

Converse of factor theorem

Let p(x) is a polynomial of degree n ≥ 1 and a is any real number. If (x - a) is a factor of p(x), then .... p(a) = 0.

An algebraic identity is an algebraic equation which is true for all values of the variables occurring in it.

Some useful quadratic identities:

(x + y)² = x² + 2xy + y²

(x - y)² = x² - 2xy + y²

(x - y)(x + y) = x² - y²

(x + a)(x + b) = x² + (a + b)x + ab

(x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx

Here x, y, z are variables and a, b are constants.

Some useful cubic identities:

(x + y)³ = x³ + y³ + 3xy(x + y)

(x - y)³ = x³ - y³ - 3xy(x - y)

x³ + y³ = (x + y)(x² - xy + y²)

x³ - y³ = (x - y)(x² + xy + y²)

x³ + y³ + z³ - 3xyz = (x + y + z)(x² + y²+ z² - xy - yz - zx)

If x + y + z = 0 then x³ + y³ + z³ = 3xyz

Here, x, y and z are variables. 

This chapter is known to have vital importance for high order thinking problems. Our solved CBSE sample paper class 9 and the marking scheme for the questions will help you to understand them. This chapter has five exercises and you can always ask your doubts using our doubt solver "Ask a Doubt" feature where we are available for you round the clock.

Chapter 2 - Polynomials Exercise Ex. 2.1

This exercise gives a basic kick start to understand the concept of Polynomials with TopperLearning’s class 9th maths ncert solutions. The questions from this exercise are generally asked as objective questions. The solution to each of the five questions are provided by our subject experts. Many more similar questions are available in our study material along with CBSE sample paper class 9 for deep and extra practice. You can use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 2 - Polynomials Exercise Ex. 2.2

Learn to find the value of a polynomial at a given point, verifying zeroes of a polynomial, and finding Zeroes of a polynomial. Use our study material for CBSE Class 9 Maths Polynomials (exercise 2.2 solution. TopperLearning’s audio-video solutions are the best for a stepwise solution. Our doubt solver "Ask a Doubt" provides quick clarification on your doubts.

Chapter 2 - Polynomials Exercise Ex. 2.3

Discover the process of diving polynomials with the Remainder Theorem in Class 9 Maths textbook solution. These questions are often asked for Board exams. Students can also avail the benefit of referring to the most important questions and the questions asked in previous exercises along with detailed solution with TopperLearning’s study material in the form of Class 9 Maths Notes and Class 9 Maths textbook solution. In case if there are any difficulties, use our doubt solver "Ask a Doubt".

Chapter 2 - Polynomials Exercise Ex. 2.4

Dive in deeper for understanding the factorisation process of polynomials with some quirky problems. There are some more questions for assessment available along with revision notes. However, Class 9 Maths Polynomials exercise 2.4 solution for every question is provided in a detailed manner by our subject experts.

Chapter 2 - Polynomials Exercise Ex. 2.5

The final exercise deals with using algebraic identities with polynomials which are solved in Class 9 Maths textbook solution. This is a tricky area for students and also a zone for making trivial mistakes. Considering this, a stepwise approach is made available with NCERT solutions for Class 9 Maths along with a concept insight for perfect clarity to the student. Refer to class 9th maths ncert solutions and ace your preparations. Our doubt solver "Ask a Doubt" feature solves all your queries.  

NCERT Polynomials Class 9 Videos

NCERT Polynomials Class 9 Revision Notes

NCERT Polynomials Class 9 Most Important Questions

NCERT Polynomials Class 9 MCQ

NCERT Polynomials Class 9 FIB

NCERT Polynomials Class 9 Short Answer Questions

List of sub chapters

9 Maths- Introduction to PolynomialsClass

9 Maths- Remainder theoremClass

9 Maths- Factorisation: Factor theoremClass

9 Maths- Factorisation: Split the middle termClass

9 Maths- Algebraic Identities: Quadratic Class

9 Maths- Algebraic Identities: Cubic Type

NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry

Thoroughly understand the concept of the Cartesian plane with TopperLearning’s class 9th maths ncert solutions Chapter 3 Coordinate Geometry. Learn to plot points in a Cartesian plane with our Maths textbook solutions. Our experts include crucial concept insights in these model answers to give you more information for conceptual clarity.

Two perpendicular number lines intersecting at point zero are called coordinate axes. The horizontal number line is the x-axis (denoted by X’OX) and the vertical one is the y-axis (denoted by Y’OY). The point of intersection of x-axis and y-axis is called origin and denoted by ‘O’.

Cartesian plane is a plane obtained by putting the coordinate axes perpendicular to each other in the plane. It is also called coordinate plane or xy plane. The x-coordinate of a point is its perpendicular distance from y-axis.The y-coordinate of a point is its perpendicular distance from x-axis.

The point where the x axis and the y axis intersect is represented by coordinate points (0, 0) and is called the origin. The abscissa of a point is the x-coordinate of the point. The ordinate of a point is the y-coordinate of the point. If the abscissa of a point is x and the ordinate of the point is y, then (x, y) are called the coordinates of the point. The axes divide the Cartesian plane into four parts called the quadrants (one fourth part), numbered I, II, III and IV anticlockwise from OX.

Sign of coordinates depicts the quadrant in which it lies. The coordinates of a point are of the form (+, +) in the first quadrant, (-, +) in the second quadrant, (-,-) in the third quadrant and (+,-) in the fourth quadrant.

The coordinates of a point on the x-axis are of the form (x, 0) and that of the point on y-axis are (0, y).

At our e-learning portal, you can find easy-to-use Class 9 Maths videos, revision notes, and assessment tools that can be accessed at any time. By embarking on a journey to learn Maths on your own using our support resources, you can improve your self-confidence too. However, if you face any problems while understanding chapter concepts, you can seek help from Maths experts at our ‘Ask a Doubt’ section.

Chapter 3 Coordinate Geometry Exercise Ex 3.1

Coordinate Geometry’s note from Class 9 Maths notes marks the foundation of a very easy and scoring chapter in CBSE Class 9 Maths textbook solution that has numerous references in higher grades. The questions from this exercise are an introduction to two-dimensional geometry. The solutions provided are apt and absolutely easy to comprehend with TopperLearning’s CBSE Class 9 Maths solution. Students can tally their solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 3 Coordinate Geometry Exercise Ex 3.2

Learn about the cartesian system and the basic ideas of plotting and location point on the graph with TopperLearning’s Class 9 Maths solution. This chapter is popular in the multiple-choice question category. Refer to the most important MCQs and related questions asked from TopperLearning’s CBSE Class 9 Maths notes. Our Math experts can assist you with your doubts on our doubt solver "Ask a Doubt".

Chapter 3 Coordinate Geometry Exercise Ex 3.3

Revise using NCERT solutions for Class 9 Maths to gain complete confidence in the final exercise of this chapter with TopperLearning’s CBSE Class 9 Maths solution. Our solutions for the preparation of CBSE online class 9 include conceptual insight to ensure locating the position of an object or a point in a particular plane. Our doubt solver "Ask a Doubt" feature provides help in case of doubts. 

Complete your Maths practice with the help of NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables. TopperLearning’s Maths experts show you the steps to solve real-world problems based on linear equations in two variables. In this chapter, you can revise important concepts to enhance your ability to represent linear equations graphically and algebraically.

Linear equations may be tricky, but you can easily learn about them by watching our CBSE Class 9 Maths video lessons. Also, learn to easily plot graphs of linear equations in two variables with our textbook solutions and other resources for this Maths chapter.

Every point on the line satisfies the equation of the line and every solution of the equation is a point on the line.

A linear equation in two variables is represented geometrically by a straight line whose points make up the collection of solutions of the equation. This is called the graph of the linear equation.

x = 0 is the equation of the y-axis and y = 0 is the equation of the x-axis.

The graph of x = k is a straight line parallel to the y-axis.

For example, the graph of the equation x = 5 is as follows:

 

Chapter 4 - Linear Equations in Two Variables Exercise Ex. 4.1

Get acquainted with questions that involve two variables with TopperLearning’s CBSE Class 9 Maths solution. This exercise is quite simple, and our solutions make it simpler to understand them as you prepare for CBSE online class 9. Give a boost to your studies with CBSE Class 9 Maths textbook solution and also refer to our video sessions for precision. Our doubt solver "Ask a Doubt" is what you need when you have queries.

Chapter 4 - Linear Equations in Two Variables Exercise Ex. 4.2

Learn about the kinds of solutions a linear equation with two variables has with TopperLearning’s CBSE Class 9 Maths solution. This concept has reference in higher grade Maths. The conceptual insight with each solution and stepwise answer gives a holistic approach as you prepare for CBSE online class 9. Our doubt solver "Ask a Doubt" feature can help in resolving queries.

Chapter 4 - Linear Equations in Two Variables Exercise Ex. 4.3

Get extensive knowledge about plotting equations on a graph with TopperLearning’s CBSE Class 9 Maths solution. TopperLearning video solutions for such problems is highly recommended. Questions from this exercise are often asked for 3-4 marks in the final exam. Make use of our doubt solver "Ask a Doubt" feature and ask your doubts.

Chapter 4 - Linear Equations in Two Variables Exercise Ex. 4.4

The final exercise gives an idea about the solutions of linear equations. Considering the criticality of this chapter, taking our weekly tests and revising using the revision notes and TopperLearning’s CBSE Class 9 Maths solution can be an efficient way to practise. Revise using TopperLearning’s class 9th maths ncert solutions as you prepare for CBSE online class 9. Students can tally their solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

NCERT Linear equations in two variables Class 9 Videos

NCERT Linear equations in two variables Class 9 Revision Notes

NCERT Linear equations in two variables Class 9 Most Important Questions

NCERT Linear equations in two variables Class 9 MCQ

NCERT Linear equations in two variables Class 9 FIB

NCERT Linear equations in two variables Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Formation of Linear Equations

Class 9 Maths- Solutions to Linear Equations

Class 9 Maths- Graphical representations

NCERT Solutions for Class 9 Maths Chapter 5 Introduction to Euclid’s Geometry

How to prove that two distinct lines can’t have more than one point in common? Find out by using our class 9th maths ncert solutions Chapter 5 Introduction to Euclid’s Geometry. Learn about Euclid’s five postulates. Revisit the relation between theorem and axiom by practising with TopperLearning’s chapter-specific solutions.

A point is that which has no part. A line is a breadthless length. The ends of a line are points.

A straight line is a line which lies evenly with the points on itself. A surface is that which has length and breadth only. The edges of a surface are lines. A plane surface is a surface which lies evenly with the straight lines on itself. Though Euclid defined a point, a line and a plane, but the definitions are not accepted by mathematicians. Therefore, these terms are taken as undefined.

An axiom is a statement accepted as true without proof, throughout Maths. A postulate is a statement accepted as true without proof, specifically in geometry.

Theorems are statements which are proved using definitions, axioms, previously proved statement and deductive reasoning.

Euclid’s 5 Postulates:

1. A straight line may be drawn from any one point to any other point.

2. A terminated line can be produced indefinitely.

1. A circle can be drawn with any centre and any radius.

2. All right angles are equal to one another.

3. If a straight line falling on two straight lines makes the interior angles on the same side of it taken together less than two right angles, then the two straight lines, if produced indefinitely, meet on that side on which the sum of angles is less than two right angles.This is known as the parallel postulate.

Textbook solutions for CBSE Class 9 Maths will be useful when you sit to revise your lessons for class tests or exams. Other than NCERT Maths solutions, our video lessons, chapter notes and online practice tests will help you to understand theorems and postulates.

Chapter 5 - Introduction to Euclid's Geometry Exercise Ex. 5.1

Learn every minute detail about Euclid’s axioms, rules and postulates about geometry and answer the questions with complete precision as you prepare for CBSE online class 9. Our CBSE Class 9 Maths textbook solution helps you understand how to write solutions for each and every question. Our experts can quickly resolve your difficulties or you can use our doubt solver "Ask a Doubt" feature.

Chapter 5 - Introduction to Euclid's Geometry Exercise Ex. 5.2

Dive deep into the concept of Equivalent Versions of Euclid’s Fifth Postulate. Every solution has the detailed method as preferred by the CBSE board. Don’t miss to check out the most important questions and Multiple choice questions from this chapter. It will provide an insight into the question pattern. Direct yourself to our doubt solver "Ask a Doubt" feature in case of doubts.

NCERT Introduction to Euclids Geometry Class 9 Videos

NCERT Introduction to Euclids Geometry Class 9 Revision Notes

NCERT Introduction to Euclids Geometry Class 9 Most Important Questions

NCERT Introduction to Euclids Geometry Class 9 MCQ

NCERT Introduction to Euclids Geometry Class 9 FIB

NCERT Introduction to Euclids Geometry Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Introduction To Euclid's Geometry

NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles

Refer to class 9th maths ncert solutions Chapter 6 Lines and Angles on TopperLearning for thorough Maths learning. Get clarity on concepts like linear pairs, vertically opposite angles, co-interior angles, alternate interior angles etc. While practicing the model solutions from this chapter, you will also learn to use the angle sum property of a triangle while solving problems.

Transversal

A line which intersects two or more lines at distinct points is called a transversal.

Pair of angles when a transversal intersects two lines.

Corresponding angles: 

∠1 and ∠5

∠2 and ∠6

∠4 and ∠8

∠3 and ∠7

Alternate interior angles:

∠4 and ∠6

∠3 and ∠5

Alternate exterior angles:

∠1 and ∠7

∠2 and ∠8

Interior angles on the same side of the transversal are referred as co-interior angles/ allied angles/ consecutive interior angles and they are:

∠4 and ∠5

∠3 and ∠6

Understand the properties of angles and lines by studying the steps used by experts in the NCERT textbook solutions. The skills gained through our CBSE Class 9 Maths chapter resources can benefit you while preparing for your Class 10, Class 11 and Class 12 exams too.

Chapter 6 - Lines And Angles Exercise Ex. 6.1

Learn more about different types of angles and lines along with some axioms and postulates. These basics of Geometry are helpful even in the higher grades. Stepwise solutions with proper reasoning is the key to acing Geometry. Students are often puzzled about the solutions and hence we provide video lessons that clear all your grey areas. It is advisable to attempt the weekly tests and practise questions for clarity. Check your answers and ask your doubts using our doubt solver "Ask a Doubt" feature.

Chapter 6 - Lines And Angles Exercise Ex. 6.2

Apply your understanding of different types of angles and find the answers to the questions asked. TopperLearning’s NCERT solutions for Class 9 Maths for the chapter Lines and Angles exercise 6.2 give you the method accepted in the CBSE board for writing the solutions. Our doubt solver "Ask a Doubt" feature ensures quick resolution for all your queries.

Chapter 6 - Lines and Angles Exercise Ex. 6.3

Familiarize yourself with the Angle sum property of a triangle. Understand the theorem and its application through our video solutions. The solutions have all the necessary calculations and reasoning. Refer to CBSE Class 9 Maths Chapter 6 exercise 6.3 solution. Get all your concerns sorted with our doubt solver "Ask a Doubt" feature.

NCERT Lines and angles Class 9 Videos

NCERT Lines and angles Class 9 Revision Notes

NCERT Lines and angles Class 9 Most Important Questions

NCERT Lines and angles Class 9 MCQ

NCERT Lines and angles Class 9 FIB

NCERT Lines and angles Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Basic concepts of Geometry

Class 9 Maths- Parallel-lines-and-Transversals

Class 9 Maths- Parallel lines and Co-interior angles

Class 9 Maths- Angle sum property of a Triangle

NCERT Solutions for Class 9 Maths Chapter 7 Triangles

Do you struggle to prove that the two triangles given in a textbook question are congruent? Do you find it difficult to explain the concept of SSS congruence in a Maths problem? If yes, then our class 9 solutions for Chapter 7 Triangles will be of immense help. These are model answers that Maths experts have developed to help students get conceptual clarity.

What are congruent figures?

Two figures are said to be congruent, if they are of the same shape and of the same size.

Two circles of the same radii are congruent.

Two squares of the same sides are congruent.

Congruent triangles

If two triangles ABC and DEF are congruent under the correspondence A ↔ D, B ↔ E and C ↔ F, then symbolically, it is expressed as Δ ABC ≅ Δ DEF.

In congruent triangles, corresponding parts are equal. We write in short ‘CPCT’ for corresponding parts of congruent triangles.

TopperLearning’s NCERT textbook solutions are easily available online for students trying to practise and understand the properties of triangles. You can use these chapter solutions along with our practice tests, concept videos, and CBSE Class 9 CBSE sample paper to effectively revise your Maths lessons.

Chapter 7 - Triangles Exercise Ex. 7.1

What are the criteria for proving that two triangles are congruent? How can you apply the test of congruencies to the given triangles? The answers to these questions are provided with apt methodology as accepted by the CBSE board by our subject experts. Refer to NCERT solutions for Class 9 Maths for Chapter 7 and exercise 7.1. Students can tally their solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 7 - Triangles Exercise Ex. 7.2

Let us understand triangles better with some special properties about different types of triangles proved with basic theorems well explained in our video sessions. Refer to these maths solutions after understanding the theorems and clear all your doubts with our special feature “Ask a Doubt” where all your doubts will be catered round the clock.

Chapter 7 - Triangles Exercise Ex. 7.3

The congruency of triangles can be proved through various tests. These tests also are important for higher grade Maths hence a strong foundation is mandatory. On referring to NCERT solutions for Class 9 Maths, do take the weekly test for thorough precision. Our doubt solver "Ask a Doubt" feature takes care of all your doubts.

Chapter 7 - Triangles Exercise Ex. 7.4

The next step is about discussing the inequalities in a triangle and also about proving them. Each theorem has its applications in the questions of the exercise, hence refer to the CBSE Class 9 Maths Chapter 7 exercise 7.4 solution for free textbook solutions. Our doubt solver "Ask a Doubt" feature can help in resolving difficulties instantly.

Chapter 7 - Triangles Exercise Ex. 7.5

Get to know the in-depth concept about triangles with class 9 maths solutions. Do take the weekly test for thorough precision. Although this exercise is optional, it is always wise to have a look at the questions and tally your solutions. Seek help using our doubt solver "Ask a Doubt" feature and math experts will answer all your difficulties. 

NCERT Triangles Class 9 Videos

NCERT Triangles Class 9 Revision Notes

NCERT Triangles Class 9 Most Important Questions

NCERT Triangles Class 9 MCQ

NCERT Triangles Class 9 FIB

NCERT Triangles Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Congruence criteria: SAS and ASA

Class 9 Maths- Congruence criteria: SSS and RHS

Class 9 Maths- Properties of Isosceles Triangle

Class 9 Maths- Inequalities in a Triangle

NCERT Solutions for Class 9 Maths chapter 8 Quadrilaterals

Learn to provide Mathematical proofs easily with TopperLearning’s class 9 solutions Chapter 8 Quadrilaterals. Can a parallelogram be a rhombus? How? Learn by practising with our solutions by Maths experts. Understand how to express your understanding of quadrilaterals such as a parallelogram and rhombus, and provide clear explanations in your answers.

What is a quadrilateral?

A quadrilateral is a closed figure obtained by joining four points (with no three points collinear) in an order.Here, ABCD is a quadrilateral.Angle sum property of a quadrilateralSum of all the angles of a quadrilateral is 360°. This is known as the angle sum property of a quadrilateral.Do watch a problem solving video on this chapter.

Here, ABCD is a quadrilateral.Angle sum property of a quadrilateralSum of all the angles of a quadrilateral is 360°. This is known as the angle sum property of a quadrilateral.

Chapter 8 - Quadrilaterals Exercise Ex. 8.1

You can score full marks in questions based on quadrilaterals by revising key concepts with our CBSE Class 9 Maths textbook solutions. If you find any of the concepts to be mind-boggling, discuss your doubts with Maths experts through our ‘Ask a Doubt’ platform.Learn all the basic properties and types of quadrilaterals and boost your score with the help of TopperLearning’s CBSE Class 9 Maths textbook solution. Our experts can quickly resolve your difficulties when you post them on our doubt solver "Ask a Doubt" feature.

Chapter 8 - Quadrilaterals Exercise Ex. 8.2.

Understand the midpoint theorem with the help of our video solutions for free textbook solutions and then give your best shot at the solutions of this exercise. Tally your answers with TopperLearning’s CBSE Class 9 Maths textbook solution and use our doubt solver "Ask a Doubt" feature in case of doubts.

NCERT Quadrilaterals Class 9 Videos

NCERT Quadrilaterals Class 9 Revision Notes

NCERT Quadrilaterals Class 9 Most Important Questions

NCERT Quadrilaterals Class 9 MCQ

NCERT Quadrilaterals Class 9 FIB

NCERT Quadrilaterals Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Types and Angle sum property

Class 9 Maths- Parallelograms basic properties

Class 9 Maths- Angle relations in Parallelogram

Class 9 Maths- Parallelograms diagonal properties

Class 9 Maths- Mid-Point Theorem

NCERT Solutions for Class 9 Maths Chapter 9 Circles

Arc of the circle

A (continuous) part of a circle is called an arc of the circle. The arc of a circle is denoted by the symbol ‘⌒’.

When an arc is formed, it divides the circle into two pieces (between the points A and B), the smaller one and the longer one. The smaller one is called the minor arc of the circle, and the greater one is called the major arc of the circle.

With CBSE Class 9 Maths chapter solutions, learn the application of important concepts such as RHS congruence rule, angle sum property of a triangle etc. This knowledge will help you think logically and write correct answers in your Maths exam. Other than expert solutions, you may want to use CBSE sample paper class 9, online mock tests, concept videos etc. to revise circles for exam preparation.

Chapter 9 - Circles Exercise Ex. 9.1

Familiarize yourself to various basic properties and terminologies of a circle from the CBSE Class 9 syllabus. Refer to the CBSE Class 9 Maths Chapter 10 exercise 10.1 solution from free textbook solutions. Ask all your queries on our doubt solver "Ask a Doubt" feature and get it solved by our experts.

Chapter 9 - Circles Exercise Ex. 9.2

Get the complete solution to this short exercise based on the basic theorems with a proper stepwise solution from CBSE Class 9 syllabus. These questions have previously been asked in CBSE board exams. Refer to CBSE Class 9 Maths sample paper to understand the types of questions asked in the exam. Use the doubt solver "Ask a Doubt" feature for all your difficulties.

Chapter 9 - Circles Exercise Ex. 9.3

Practise problems based on properties of the circle regarding chords through TopperLearning’s NCERT solutions for class 9 Maths. Our solutions have proper steps and reasoning as accepted by the CBSE board. TopperLearning’s doubt solver "Ask a Doubt" feature provides quick assistance to all your queries.

Chapter 9 - Circles Exercise Ex. 9.4

Discover questions on Equal Chords and Their Distances from the Centre and refer to TopperLearning’s class 9 maths solutions detailed stepwise approach-based solutions. It is advisable to refer to the most important questions from this chapter from TopperLearning’s study material. Students can check their solutions and use our doubt solver "Ask a Doubt" feature to ask related queries.

Chapter 9 - Circles Exercise Ex. 9.5

Get introduced to cyclic quadrilaterals and understand all the basic features of it with TopperLearning’s NCERT solutions for class 9 Maths. This is the easiest and also the most scoring part of this chapter. Our subject experts have solved these questions with utmost clarity and detailed approach as accepted by the CBSE board. Check your answers and use our doubt solver "Ask a Doubt" feature for any concerns.

NCERT Circles Class 9 Videos

NCERT Circles Class 9 Revision Notes

NCERT Circles Class 9 Most Important Questions

NCERT Circles Class 9 MCQ

NCERT Circles Class 9 FIB

NCERT Circles Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Introduction to Circles

Class 9 Maths- Angle subtended by the chord

Class 9 Maths- Perpendicular from centre to chord

Class 9 Maths- Properties of equal chords 

Class 9 Maths- Cyclic Quadrilaterals

NCERT Solutions for Class 9 Maths Chapter 10 Heron’s Formula

Get answers on Heron’s formula and the applications of Heron’s formula in this chapter. At TopperLearning, find free CBSE Class 9 Maths solutions to the 2 exercises in Chapter 10 from the Maths NCERT textbook. Using Heron’s formula, learn to find the area of triangles and the area of polygons.

The region enclosed within a simple closed figure is called its area. Area of a triangle =  

Area of an equilateral triangle =  sq units, where ‘a’ is the side length of an equilateral triangle.

Semi-perimeter is half of the perimeter. If a, b and c denote the lengths of the sides of a triangle, then the area of the triangle is calculated by using Heron's formula, as given below:

Area of triangle =  ,s = semi - perimeter = . For every triangle, the values of (s – a), (s – b), and (s – c) are positive. Area of a quadrilateral can be calculated by dividing the quadrilateral into two triangles and using Heron's formula for calculating area of each triangle.

Chapter 10 - Heron's Formula Exercise Ex. 10.1

Discover the methodology of calculating the area of a triangle Heron’s formula with TopperLearning’s class 9 maths solutions. Make use of our doubt solver "Ask a Doubt" feature for quick assistance on problems by our Math experts.

Chapter 10 - Heron's Formula Exercise Ex. 10.2

Get extensive knowledge about finding the area of a quadrilateral using Heron’s formula with this exercise. TopperLearning video solution for such problems is highly recommended. Questions from this exercise are often asked for 3-4 makes in final exams. Skilled experts address your doubts instantly when you use our doubt solver "Ask a Doubt" feature in case of doubts.

NCERT Heron’s Formula Class 9 Videos

NCERT Heron’s Formula Class 9 Revision Notes

NCERT Heron’s Formula Class 9 Most Important Questions

NCERT Heron’s Formula Class 9 MCQ

NCERT Heron’s Formula Class 9 FIB

NCERT Heron’s Formula Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Introduction to Herons formula

Class 9 Maths- Application of Herons formula

NCERT Solutions for Class 9 Maths Chapter 11 Surface Areas and Volumes

Revise the most important concepts in the chapter with class 9 maths solutions Chapter 11 Surface Areas and Volumes. In this chapter, TopperLearning gives you access to some of the best textbook solutions to understand the surface area of objects and spaces using the given data. Practise calculating the lateral surface area of a cubical box or the CSA of a given cylindrical pipe with our solutions.

If l, b, h denote respectively the length, breadth and height of a cuboid, then:

Lateral surface area or Area of four walls = 2(ℓ + b) h

Total surface area = 2(ℓb + bh + hℓ)

Volume = ℓ × b × h

Diagonal of a cuboid = 

If the length of each edge of a cube is 'a' units, then:

Lateral surface area = 4 x (edge)²

Total surface area = 6 x (edge)^²

Volume = (edge)³

Diagonal of a cube = √3 x edge

If r and h respectively denote the radius of the base and the height of a right circular cylinder, then:

Area of each end or Base area = 𝜋r²

Area of curved surface or lateral surface area = perimeter of the base x height = 2𝜋rh

Total surface area (including both ends) = 2𝜋rh + 2𝜋r² = 2𝜋r (h + r)

Volume = Area of the base x height = 𝜋r²h

On our e-learning portal, we provide free access to NCERT textbook solutions and other CBSE Class 9 Maths study materials. To practise Maths, you may refer to our online practice tests, video lessons, practice question papers and more.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.1

Get acquainted with questions about finding the surface area and volume of a cube and cuboid. This exercise is quite simple, and our solutions make it simpler to understand them. Get a boost in your studies with CBSE Class 9 Maths textbook solution and also refer to our video sessions for a better grip on the concepts. TopperLearning’s doubt solver "Ask a Doubt" feature gives quick assistance to all your queries.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.2

Solve problems about finding surface area of a Right Circular Cylinder with TopperLearning’s NCERT solutions for class 9 Maths. Direct yourself to our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.3

Learn how to solve questions on finding curved surface and total surface area of a right circular cone with TopperLearning’s NCERT solutions for Class 9 Maths. Check your solutions and use our doubt solver "Ask a Doubt" feature in case of doubts.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.4

Practise problems on finding curved surface and total surface area of a sphere and a hemisphere with CBSE Class 9 Maths textbook solution. Use our doubt solver "Ask a Doubt" feature and get your doubts resolved.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.5

Through TopperLearning’s NCERT solutions for class 9 Maths for CBSE Class 9 Maths Chapter 13 exercise 13.9 solution, ace solving questions about the volume of a cuboid.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.6

Master solving problems about finding the volume of a cylinder with TopperLearning solutions for Class 9th Maths. Our experts will help you with your doubts with our doubt solver "Ask a Doubt."

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.7

Gain expertise by solving every question on finding the volume of a right circular cone with TopperLearning’s CBSE Class 9 Maths textbook solution. Get your doubts quickly resolved using our doubt solver "Ask a Doubt."

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.8

Compute the volume of a sphere and hemisphere with TopperLearning’s NCERT solutions for class 9 Maths. Our doubt solver "Ask a Doubt" provides quick clarification on your doubts.

Chapter 11 - Surface Areas and Volumes Exercise Ex. 11.9

Understand the in-depth concepts of surface areas and volumes in this chapter with NCERT solutions for Class 9 Maths when you take the weekly test. Although this exercise is optional, it is always wise to have a look at the questions and tally your solutions to gauge your preparation.

Revise using class 9 maths solutions to gain complete confidence in the final exercise of this chapter. Our solutions with conceptual insights will help you locate the position of an object or a point in a particular plane. If there are any difficulties, use our doubt solver "Ask a Doubt". 

NCERT Surface areas and volumes Class 9 Videos

NCERT Surface areas and volumes Class 9 Revision Notes

NCERT Surface areas and volumes Class 9 Most Important Questions

NCERT Surface areas and volumes Class 9 MCQ

NCERT Surface areas and volumes Class 9 FIB

NCERT Surface areas and volumes Class 9 Short Answer Questions

List of sub chapters

Class 9 Maths- Surface area of a Cube and Cuboid

Class 9 Maths- Surface Area Of A Cylinder

Class 9 Maths- Surface Area Of A Cone

Class 9 Maths- Sphere And Hemisphere

Class 9 Maths- Volume Of A Cuboid

Class 9 Maths- Volume Of A Cylinder

Class 9 Maths- Volume Of A Cone

Class 9 Maths- Sphere And Hemisphere

NCERT Solutions for Class 9 Maths Chapter 12 Statistics

How is data collected? What are the ways to present data? Discover the answers for these important questions in our class 9 maths solutions Chapter 12 Statistics. Practise the presentation of data in the form of histograms and bar graphs with our model answers for questions in the NCERT book.

A measure of central tendency tries to estimate the central value which represents the entire data.

The three measures of central tendency for ungrouped data are mean, mode and median.

The mean value of a variable is defined as the sum of all the values of the variable divided by the number of values.

If x₁, x₂, x₃ .... , x_n are n values of a variable X, then the arithmetic mean of these values is given by:

If a variate X takes values x₁, x₂, x₃.... , x_n with corresponding frequencies f₁, f₂, f₃,... fn respectively, then arithmetic mean of these values is given by

Median is the value of middle most observation(s).

The median is calculated only after arranging the data in ascending order or descending order.

Median =  

Mode of a statistical data is the value of that variate which has the maximum frequency.

The variate corresponding to the highest frequency is to be taken as the mode and not the frequency.

The disadvantage of arithmetic mean is that it is affected by extreme values.

The disadvantage of mode is that it is not uniquely defined in many cases.

At TopperLearning, you can access our online NCERT textbook solutions for Class 9 Maths to revise mean, mode and median calculations. The chapter solutions also show the accurate way to construct a frequency distribution table according to the given information. You can learn statistics on our learning portal through video lessons, online practice tests and other Maths resources as well.

Chapter 12 - Statistics Exercise Ex. 12.1

Learn everything about primary, secondary, grouped and ungrouped data with CBSE Class 9 Maths textbook solution. This chapter lays the foundation for an important concept in Maths. Our Math experts can assist you with your doubts on our doubt solver "Ask a Doubt".

Chapter 12 - Statistics Exercise Ex. 12.2

Get extensive knowledge about the classification of grouped and ungrouped data in a frequency with TopperLearning’s NCERT solutions for Class 9 Maths. TopperLearning’s video solutions for such problems is highly recommended to develop a conceptual understanding of the topic. Questions from this exercise are often asked for 3-4 marks in the final examinations. Use our doubt solver "Ask a Doubt" feature and ask your queries.

Chapter 12 - Statistics Exercise Ex. 12.3

Obtain a detailed methodology of solving questions regarding the graphical representation of data with our class 9 maths solutions. Our experts quickly resolve your difficulties whenever you use our doubt solver "Ask a Doubt" feature.

Chapter 12 - Statistics Exercise Ex. 12.4

Understand the process of finding mean, median and mode using different methods in a step-wise approach with TopperLearning’s Maths solutions. Check your answers and ask your doubts using our doubt solver "Ask a Doubt" feature. 

The most effective source while preparing for CBSE online class 9 is an audio-video study material through our video sessions. TopperLearning’s study material – particularly CBSE Class 9 notes and free textbook solutions – proves to be quite effective in your preparation. Get all your concerns addressed with our doubt solver "Ask a Doubt" feature.

NCERT Statistics Class 9 Videos

NCERT Statistics Class 9 Revision Notes

NCERT Statistics Class 9 Most Important Questions

NCERT Statistics Class 9 MCQ

NCERT Statistics Class 9 FIB

NCERT Statistics Class 9 Short Answer Questions

List of sub chaptesrs

Class 9 Maths- Grouping And Tabulation Of Data

Class 9 MathS- Graphical Representation Of Data

Class 9 Maths- Measures Of Central Tendency

CBSE Class 9 Chapter-wise Marks Weightage

TopperLearning has made available an organised method for you to know the chapter-wise marks weightage. This helps in focusing better on the chapters with higher scoring potential. Prepare each of these chapters with TopperLearning’s class 9 maths solutions and also solve CBSE Class 9 sample paper 2020-21 to gain confidence.

COURSE STRUCTURE CBSE CLASS 9

CBSE Class 9 Maths – Standard Question Paper (2021-2022)

The paper pattern will help you prepare for exams by focusing on the areas that need more effort. CBSE question papers are designed in a way that assesses the understanding of a student’s grasp of a concept. Hence, we provide you with the paper design along with CBSE Class 9 sample paper 2020-21 to help you score higher marks.