NCERT Solutions Class 9

Class 9 – Mathematics Triangles – Exercise 7.2 Exercise 7.2 Question : 1 : In an isosceles triangle ABC, with AB = AC, the bisectors of ∠ B and ∠ C intersect each other at O. Join A to O.…

Class 9 – Mathematics Triangles – Exercise 7.1 Exercise 7.1 Question : 1 In quadrilateral ACBD,AC = AD and AB bisects ∠ A (see Fig. 7.16). Show that Δ ABC ≅Δ ABD. What can you say about BC and BD? Answer…

Class 9 – Mathematics Lines And Angles – Exercise 6.3 Exercise 6.3 Question : 1 In the figure, sides QP and RQ of ∆ PQR are produced to points S and T respectively. If ∠SPR = 1350 and ∠PQT = 1100, find…

Class 9 – Mathematics Lines And Angles – Exercise 6.2 Exercise 6.2 Question : 1: In the figure, find the values of x and y and then show that AB || CD. Answer : In the given figure, a transversal…

Class 9 – Mathematics Lines And Angles – Exercise 6.1 Question :1 : In the figure lines AB and CD intersect at O.  If∠ AOC + ∠ BOE = 700 and ∠ BOD = 400,find ∠ BOE and reflex ∠…

Class 9 – Mathematics Introduction to Euclids Geometry – Exercise 5.2 Exercise 5.2 Question :1 : How would you rewrite Euclid’s fifth postulate so that it would be easier to understand? Answer : When two lines are cut by a…

Class 9 – Mathematics Introduction to Euclids Geometry – Exercise 5.1 Exercise 5.1 Question : 1: Which of the following statements are true and which are false? Give reasons for your answers. (i) Only one line can pass through a…

Class 9 – Mathematics Linear Equations in Two Variables – Exercise 4.4 Exercise 4.4 Question : Give the geometric representations of y = 3 as an equation (i) in one variable                                 (ii) in two variables Answer : Given, equation is:…

Class 9 – Mathematics Linear Equations in Two Variables – Exercise 4.3 Question : Draw the graph of each of the following linear equations in two variables: (i) x + y = 4                   (ii) x – y = 2                  (iii)…

Class 9 – Mathematics Linear Equations in Two Variables – Exercise 4.2 Exercise 4.2 Question : Which one of the following options is true, and why?   y = 3x + 5 has  (i) a unique solution,          (ii) only two solutions,…

Class 9 – Mathematics Linear Equations in Two Variables – Exercise 4.1 Exercise 4.1 Question : The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. (Take…

Class 9 – Mathematics Coordinate Geometry – Exercise 3.3 Exercise 3.3 Question :1. Represent the following points (3, −1), (−2, 4), (1, 2), (−1, 0) and (−3, −5) on a Cartesian plane and also tell in which quadrant do they…