The circumference of a circle with a radius of 4 ft is: 25.13 feet (r x 2 x Pi = circumference).
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A circle with a radius of 14 feet has a circumference of 87.96 feet.
The circumference of a circle that has a radius of 12 feet is about 75.4 feet.
The circumference of a circle when the radius is 25 feet equals about 157.08 feet.
The circumference is 50π ft or 157.08 ft.
Circumference of a circle = 2*pi*radius or diameter*pi so in this case circumference = 2 x 3.142 x 1.5 ft = 9.42 ft