If the circumference is 34.54, the radius is 5.497211734394065.
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The radius is 1/2 of the circumference.
If the circumference is 20 the radius is 3.18
If the circumference of a circle is 351.68 the radius is: 56
The radius of a circle with a circumference of 12 is: 1.91
the radius is 10.5 inches. * * * * * Wrong! Circumference = 2*pi*Radius Or, Radius = Circumference/(2*pi) So circumference = 21 inches implies radius = 3.34 inches (to 3 sf)