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The area of a square with sides of length x units is x2 square units. So x2 = 81 which implies that x = 9.
Area of square = x2 where x is the length of each side. So x2 = 81 sq ft x = sqrt(81) ft = 9 ft
To find the length of a side of a square when the area is known, you need to take the square root of the area. In this case, the area is 81 sq m, so the side length would be the square root of 81, which is 9 meters. Therefore, the side of the square is 9 meters.
If it is a square then each side will have a length of 9 inches
The length of each of the sides is then 9 metres.