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Circumference = 16pi ie 2pi*r = 16pi so that r = 8 units Then area = pi*r2 = 64*pi square units.
You need to work backwards. the formula for area is r^2pi=A. to find the radius, r, you divide the diameter in half. therefore (d/2)^2pi=Area. plug in your #'s an solve. Ex. Area=16pi Find diameter. (d/2)^2pi=16pi divide both sides by pi (d/2)^2= 16 take the square root of both sides d/2=4 multiply both sides by 2 d=8
C=2Pir, since r is 8. the answer would be 16pi.
16pi. If your talking feet would be approximately 50 feet
Circumference of a circle is the diameter times pi or 2pi times the radius. Given the diameter, circumference = 16 times pi. So, the circumference is 16pi or 50.265