Circumference = Pi x d: 3.14 x 13 = 40.82 feet
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The circumference of a circle 8 feet in diameter is about 25.13 feet.
approx. 25.13 feet
A 45-foot diameter circle has an area of 1,590.4 square feet.
The area of a circle with a 7-foot diameter is: 38.48 square feet.
43 linear feet. The diameter of the circle is the longest distance that you can have in the circle.