Question

4) Find the perimeter of a square if its diagonal 10
$\sqrt{2}$
2 cm
A) 10cm
B) 4012 cm
C) 20cm
D) 40cm​

Answer 1

Answer:

$side \times \sqrt{2 } = diagonal \\ side \: = \frac{10 \times \sqrt{2} }{ \sqrt{2} } = 10 \\ perimeter = 4 \times side \\ 4 \times 10 = 40 \\ area \: = {(side)}^{2} \\ = {10}^{2} = 100$