Question

The length of the diagonal of a square is 20 cm then its perimetre ?

• A. 40√2 cm
• B. 40 cm
• C. 200 cm
• D. 10√2 cm

Answer 1

Answer:

A. 40√2 cm

Let 'a' be the side of a square a√2 = 20 a=20/2√2 = 10√2 Perimeter of square = 4 x a = 4 x 10√2 =40√2 cm