Area of any circle = pi*radius squared
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A 45-foot circumference circle has an area of: 161.1 square feet.
How many sq. Ft. Is in a 33 ft.diameter circle
pi ft^2
The area of a 5 foot circle is: 19.63 square feet.
If the circle is 20 ft radius, the area is π·20² = 1256.637 ft² If the circle is 20 ft diameter, the area is π·(20/2)² = 314.1593 ft² If the circle is 20 ft circumference, the are is π·(20/2π)² = 63.66198 ft²