Approximately 1,256.6 ft2
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The area of a circle is computed by the formula A = pi * r2 (r is the radius of the circle)For a 20 foot circle, the radius is 10 feet and the area is 314.16 square feet.
Circumference of a circle = 2*pi*radius or pi*diameter Area of a circle = pi*radius squared
A circle with a radius of 20 yards has an area of 1,256.64 square yards.
324.47 square feet
It is 3.18 feet, approx.