you divide circumference by 2 pi, square that value, and multiply by pi, making the area pi inches squared
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Circumference = 31.4 inches, approx. Area = 78.5 square inches, approx.
A circle with a radius of 8 inches has a circumference of 50.27 inches.
radius=13 area=40.82 circumfrence=8.28025477707
The radius of a circle with a circumference of 232.4 inches is 37 inches.
Use: 2*pi*radius = circumference