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 […]
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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 […]
April 5, 2025
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 […]
April 5, 2025
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 […]
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. 39 Q1. What are canal rays?Ans: Canal rays are a type of positively charged radiation discovered by E. Goldstein in 1886. They are […]
April 5, 2025
Table of contents Page No. 51 Q1. Who discovered cells and how?Ans: Q2. Why is the cell called the structural and functional unit of life?Ans: Page […]
April 5, 2025
Table of contents Page No. 61 Q1. What is a tissue?Ans: A group of cells that are similar in structure and/or work together to achieve a particular […]
April 5, 2025
Table of contents Page No. 74 Q1. An object has moved through a distance. Can it have zero displacements? If yes, support your answer with an […]