If you mean the circumference or "perimeter": C = 2(pi)r, where r is the radius of the circle
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We can calculate the area of a circle by using the formula areacircle pi times r2. We know that pi is about 3.14 and r is the radius of the circle. Πr2 Where: Π pi (3.14159265...) r radius of circle
To calculate this you will need the diameter of the circle. The formula is: diameter/2*pi If you don't know the diameter you can also use the area of the circle: Sqrt(Area/pi) = radius
You take half the area of a circle in square feet. The formula is: 1/2 * pi * (radius)2
In order to calculate the circumference of a circle one must use a specific formula. The mathematical formula is C = D x 3.14. This translates to the circumference being equal to the diameter multiplied by 3.14, which is the equivalent to pi.
Radius x 2 x 3.14 = Area * * * * * That is the formula for the circumference! The area = pi*radius2