Question

(i) Find perimeter of a square if its diagonal is 10 cm​

Answer 1

Answer:

if the diagonal is 10 cm then by using Pythagoras theorem we can find its side....

s^2 + s^2 = 10 cm

2(s^2) = 10 cm

s^2 = 10/2 = 5

s = √5 cm.

area = s^2 = (√5)^2 = 5cm square....

Answer 2

Answer:

Let the side of the Square be 'a'

Perimeter = 4a

Diagonal of a Square = √2a

10cm = √2 ×a

a = 10/√2 cm

Perimeter of the Square = 4 × 10/√2

= 20√2cm