Find the square root of the area, and multiply by 4.
If the area is 100, the square root would be 10 (since 10x10= 100) That 10 is the length of one side. Squares have 4 sides of equal length, so 10x4= 40 for the perimeter. Make sense? BTW, works for cm, inches, feet, miles or smoots- does not matter.
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If a square has an area of 151.29cm2 its perimeter is: 49.2 cm
The perimeter of a square, if it has an area of 25 cm, is: 20 cm
perimeter: 180 cm area: 1856 square cm
The perimeter is 20 cm
The area of square is : 14400.0