The length of each side of the pool is 11 ft.
A square is a quadrilateral (has four sides and four angles) in which all the sides are equal and opposite sides are parallel to each other.
The diagonals of a square are equal to each other and they bisect each other.
Let x represent the length of the pool. Since the pool is a square, hence all the sides of the pool are equal. Given that the area is 121 square feet, hence:
Area of pool = length * length
121 ft² = x × x
121 = x²
x = √121
x = 11 ft.
Therefore the length of each side of the pool is 11 ft.
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