Take the square root of the area.
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i think you find the square root of the area. that's the length and the width, so you multiply it.
The length and width of a square by definition are of equal length. The area (A) of a square = d2, where d is the length of one side. If the area is known, then the length of the side of a square, d = √A (square root of A).
Divide the perimeter by 4 and then square the result to find the area of the square.
If the room is square, then the area is the square of the length of any side.The length of any side is the square root of the area = sqrt(225) = 15.
To find the side length of a square with an area of 36, you need to take the square root of the area. In this case, the square root of 36 is 6. Therefore, the side length of the square is 6 units.