The circumference of a circle with a diameter of 2 feet is 6.28 feet.
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A circumference of 6.28 feet.
A circle with a radius (d/2) of 2.1 feet has a circumference of 13.2 feet.
Circumference = 2(pi)r if diameter = 18ft then the radius is 9ft, so: Circumference = 2(pi)9 = 56.54ft =] -ray
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
9*pi or 2*pi*4.5