Question

if the area of a square is 81 cm²,then the measure of its side is ​

Answer 1

Answer:

Heya friend,

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

according to question,

Area of a square = side x side

=> 81 = X X X

=> 81 = x^2

=> x = v81

=> x = 9

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

Perimeter of a square = 4 x side

= 4x9

= 36cm.

Answer 2

Explanation:

area =6a^2

81 = 6a^2

a^2 =81/6

=13.5

a = √13.5

a=3.6