April 5, 2025
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 […]
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April 5, 2025
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 […]
April 5, 2025
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 […]
April 5, 2025
Exercise 7.1 Q1. In quadrilateral ACBD, AC = AD and AB bisects ∠ A. Show that ∆ ABC ≅ ∆ ABD. What can you say about […]
April 5, 2025
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 […]
April 5, 2025
Table of contents Page No. 27 Q1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 […]
April 5, 2025
Table of contents Page No. 141 Q1: What do we get from cereals, pulses, fruits, and vegetables? Ans: The things we get from cereals, pulses, fruits, and […]
April 5, 2025
Table of contents Page No. 129 Q1. How does the sound produced by a vibrating object in a medium reach your ear?Ans: When the object vibrates, it […]
April 5, 2025
Table of contents Page No. 115 Q1. A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of […]