9 x 4 = 36
Note: each side measures 9", and there are 4 sides to a square.
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Area = 9 sq inches Length of side = sqrt(9) = 3 inches Perimeter = 4*Length of side = 4*3 = 12 inches
Each side would be 3 inches long and there are 4 sides, so 12 inches.
It is: 4*9 = 36 inches
Each side must be 36/4 ie 9 in so area is 81 sq in
If the area of a square is 81, then the length of a side is 9. Add up the length of all four sides to get the perimeter: 9 + 9 + 9 + 9