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What is the radius of a circle with circumference 13 feet?
Circumference = Pi x Diameter
Diameter = 2Radii
Circuference =3.141592 x 2R
13 =3.141592 x 2R divide both sides by Pi x 2
R = 13 /[2 x 3.141592]
R =2.069 feet- The Radius of the circle.