Question

Find the side and perimeter of a square whose diagonal is 10√2

Answer 1

side 10, perimeter 40 will be the answer

Answer 2

as side=
$as \: side = \sqrt{2} d \div 2 \\ put \: value \: of \: d \: in \: above \: formula \\ we \: get \: \sqrt{2} \times 10 \sqrt{2} \div 2 = 20 \div 2 \\ = 10 \\ therefore \: side = 10 \\ perimeter = 4 \times side \\ = 4 \times 10 = 40$