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A circle with a radius of 3 feet has a circumference of 18.85 feet.
Circumference of circle: 2*pi*8 = 50.265 feet to 3 decimal places
The circumference of a circle with a radius of 3 m is: 18.85 m.
A circle with a radius of 3 inches has a circumference of 18.8 inches
The circumference of a circle is the same as the perimeter of a circle, so the perimeter and circumference would both be 3 ft.