It is the square root of 169 which is 13 units of length
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You find the square root 0f 169 which is 13.
The area of a square is the (perimeter/4)^2. The perimeter is 52, so 52/4=13. 13^2 is 169. The area of the square is 169 cm.^2.
Area = Length * Length Area = Length2 Length = Area Length = 230 Length = 15.16575..... -Oliver Crow
The length of a square with an area of 81 would be 9.