Question

find the area and the perimeter of a square whose diagonal is 10 cm long

Answer 1

Area=50
Perimeter= 20×1.4

Answer 2

Diagonal of square = √2 x side
10 = √2 x side
side = 10/√2
Area = 10/√2 x 10/√2
= 100/2 = 50cm^2
Perimeter = 4(10/√2)
= 40/√2 cm