Question

Length of a diagonal of a square is 15
$\sqrt{2}$
cm. Find its perimeter.
(A) 15 cm
(B) 30 cm
(C) 45 cm
(D) 60 cm​

Answer 1

Step-by-step explanation:

length of diagonal of a square= 15√2

area of square= 1/2 × (diagonal)²

= 1/2 × (15√2)²

= 1/2× 225 × 2

= 225 cm²

now,

side of square= √area

= √225

= 15 cm

perimeter of square= 4 × side

= 4 × 15 cm

= 60 cm