Find the length of the side of a square if its area is 81 square inches.

A. 9 inches

B. 3 inches

C. 40.5 inches

D. 162 inches

Given that the area is 81 square inches, find out the length of the side of a square.

Area of Square = s^2

To find out the length, find the square root of 81.

Square root of 81 is 9.

9 x 9 = 81

Therefore, the length of a side on a square with an area of 81 inches is 9 inches.