You are given a square. If the area of the square is 81 in^2, you can find the length of one of the sides by__
taking the square root of 81.
So, the length of one side of the square would be the square root of 81, which is 9 inches.
You can find the perimeter of the square by
multiplying the length of one side by 4, since all sides of a square are equal in length.
In this case, the perimeter of the square with a side length of 9 inches would be 9 inches x 4 = 36 inches.