For the perimeter...
1.) you measure your sides
2.) addup your measurements
3.) youv'e got your answer
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Perimeter = 4 times the square root of the area.
Area: 1/2πr2 Perimeter: 1/2πd+d
Perimeter: add all sides area: multiply length times width for rectangles
156 It is impossible to calculate the area of a rectangle from its perimeter if no other dimension is known. The area of a rectangle is the product of its length and width, and the perimeter is twice the sum of its length and width.
The perimeter of a square is four times the length of any side. The area is the length of a side multiplied by itself (which is to say, squared).