Question

the area of a square is 81 cm square find its perimeter

Answer 1

a^2=81
a=9
perimeter of square =4a
4*9=36

Answer 2

Heya friend,


Let the length of each side of a square be x cm. Then,

according to question,

Area of a square = side × side

=> 81 = x × x

=> 81 = x^2

=> x = √81

=> x = 9

Hence, the length of each side of a square is 9cm.

Perimeter of a square = 4 × side

= 4×9

= 36cm.





Thanks

With regards@

Tanisha