The area is 9 cm2
12 / 4 = 3
3 * 3 = 9
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The sidelength of a square is the square root of its area, and its perimeter is four time this. 4 x sqrt(9 cm2) = 12 centimetres.
The area of a square with a 12-foot perimeter is: nine square feet.
The area of a square with a perimeter of 12 feet is: 9 square feet.
The square root of 144 is 12 Perimeter = 4*12 = 48 meters
The perimeter of a square is four times the length of any of its sides. Thus, you can divide the perimeter by 4, and then square the result to get the area.