If the area of a square is 64 cm², what is the length of its diagonal?
Q1. If the area of a square is 64 cm², what is the length of its diagonal?
Answer: 8√2 cm
Explanation: Area = side² = 64, so side = √64 = 8. Diagonal = √(8² + 8²) = √(64 + 64) = √128 = √(64*2) = 8√2.