Class 9 Maths Text Book Solutions

Table of contents Exercise 11.1 Q1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved […]

Q1. A survey conducted by an organisation for the cause of illness and death among the women between the ages 15–44 (in years) worldwide, found the […]

Exercise 6.1 Q1. In Fig. 6.13, lines AB and CD intersect at O. If ∠AOC +∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex […]

Exercise 7.1 Q1. In quadrilateral ACBD, AC = AD and AB bisects ∠ A. Show that ∆ ABC ≅ ∆ ABD. What can you say about […]

Exercise 8.1 Q1. If the diagonals of a parallelogram are equal, then show that it is a rectangle.Ans:  Given that,AC = BDTo Prove:  ABCD is a […]

Exercise 9.1 Q1. Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at […]

Q1. A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. Find the area of the signal board, using Heron’s formula. If […]

Q1. Find the value of the polynomial 5x – 4x2 + 3 at (i) x = 0 (ii) x = –1 (iii) x = 2Ans: Let f(x) = 5x−4x2+3(i) When x […]