NCERT Solutions Class-9

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Chapterwise-Solutions-Class-9

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Class 9 NCERT Solutions- Chapter 7 Triangles - Exercise 7.1

Last Updated: 28 December 2020

Question 1. In quadrilateral ACBD AC = AD and AB bisects ∠ A (see Fig. 7.16). Show that ∆ ABC ≅ ∆ ABD What can you say about BC and BD?Solution:Given that AC and AD are eq...read more

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NCERT Solutions Class-9

Class 9 NCERT Solutions- Chapter 5 Introduction to Euclid's Geometry - Exercise 5.2

Last Updated: 28 December 2020

Question 1: How would you rewrite Euclid’s fifth postulate so that it would be easier to understand?Solution:Euclid’s fifth postulate:Euclid's fifth postulate says that If...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions- Chapter 2 Polynomials - Exercise 2.2

Last Updated: 21 December 2020

Question 1: Find the value of the polynomial (x) = 5x − 4x2 + 3 (i) x = 0(ii) x = –1(iii) x = 2Solution:Given equation: 5x − 4x2 + 3Therefore, let f(x) = 5x - 4x2 + 3(i) W ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions- Chapter 13 Surface Areas And Volumes - Exercise 13.4

Last Updated: 03 February 2021

Question 1. Find the surface area of a sphere of radius:(i) 10.5cm (ii) 5.6cm (iii) 14cm(Assume π=22/7)Solution:We know that, Surface area of sphere (SA) = 4πr²(i) Radius ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 13 Surface Areas And Volumes - Exercise 13.3

Last Updated: 04 March 2021

Question 1: Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.Solution:Given:Radius = diameter / 2Radius(r) = (10.5/2)c...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 13 Surface Areas And Volumes - Exercise 13.5

Last Updated: 04 March 2021

Question 1. A matchbox measures 4cm×2.5cm×1.5cm. What will be the volume of a packet containing 12 such boxes?Solution:Given,Dimensions of the matchboxl = 4cm, b = 2.5cm, ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 2 Polynomials - Exercise 2.5 | Set 1

Last Updated: 26 July 2022

Question 1. Use suitable identities to find the following products:(i) (x + 4) (x + 10)Solution:Using formula, (x + a) (x + b) = x2 + (a + b)x + ab[So, a = 4 and b = 10](x ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 4 Linear Equations in two variables - Exercise 4.1

Last Updated: 23 February 2021

Question 1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.Solution:Let's take the cost of a noteb ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions- Chapter 1 Number System - Exercise 1.1

Last Updated: 17 November 2020

Question 1: Is zero a rational number? Can you write it in the form p/q, where p and q are integers and q ≠ 0?Solution:A number is a rational number if it can be written i...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 1 Number System - Exercise 1.2

Last Updated: 12 March 2021

Question 1: State whether the following statements are true or false. Justify your answers.(i) Every irrational number is a real number.(ii) Every point on the number line...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 3 Coordinate Geometry - Exercise 3.2

Last Updated: 04 January 2021

Question 1: Write the answer to each of the following questions:(i) What is the name of the horizontal and the vertical lines drawn to determine the position of any point ...read more

NCERT Solutions Class-9

Class 9 NCERT Solutions - Chapter 3 Coordinate Geometry - Exercise 3.3

Last Updated: 23 February 2021

Question 1: In which quadrant or on which axis do each of the points (– 2, 4), (3, – 1), (– 1, 0), (1, 2) and (– 3, – 5) lie? Verify your answer by locating them on the Ca...read more

NCERT Solutions Class-9

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