Area of any circle = (pi) x (radius)2
Radius = 1/2 of the diameter.
With this information, you can now find the area of any circle,
including that one, on your own.
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how many linear feet in a 20 foot diameter
43 linear feet. The diameter of the circle is the longest distance that you can have in the circle.
12.56
615.75
3.14159265 square feet.