Question: In a cyclic quadrilateral ABCD, AB = 4, BC= 5, CD = 9 and DA = 5. Find the length of the diagonal AC. (1) 8 (2) 7 (3) 6 (4) √61. Solution: AC*BD = 36+25 = 61 AC/BD = 20+45/...
Class 8 Science – Crop Production and Management: Agricultural Practices 1. Introduction Agriculture is the process of growing crops and rearing animals for food, fiber, and other products. Crop...
Class 8 Science – Sound: Production and Propagation 1. Introduction Sound is a form of energy that produces a sensation of hearing. It is produced when an object vibrates and creates...
Class 8 Science – Combustion and Flame 1. Introduction Combustion is the process in which a substance reacts with oxygen to release heat and light. Most fuels undergo combustion to provide...