Circumference = 2*pi*r
So 2*pi*r feet = 16*pi feet
that is r = 8 feet
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The radius is 8 feet.
16pi. If your talking feet would be approximately 50 feet
A circle with a radius of 6 feet has a circumference of 37.7 feet.
A circle with a radius of 100 feet has a circumference of 628.32 feet.
If the radius of a circle is 8 feet the circumference is about 50.27 feet.