Circumference of a circle = 2*pi*radius or pi*diameter
Area of a circle = pi*radius squared
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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.
5 feet = 5 feet
The circumference of a 12-foot-diameter circle is 37.7 feet.
A foot IS a linear measure so a foot is a linear foot. So 84 linear feet is 84 feet.