Circumference = 2*pi*raduis
16 = 2*pi*r
divide both sides by 2pi
16/2pi = r
8/pi = radius
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About 100.53 feet.
Radius = Circumference/(2*pi) = 0.875 feet.
The circumference of a circle if the radius is 2 feet is: about 12.57 feet.
If the radius of a circle is 8 feet the circumference is about 50.27 feet.
The radius of a circle with a circumference of 13 feet is: 2.069 feet.