If the radius of a circle is 8.5 inches the circumference is: 53.4 inches
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A circle with a radius of six inches has a circumference of 37.7 inches.
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)
The radius is 30 inches.
If a circle's radius is 240 inches, its circumference is: 1,508 inches or 125.6 feet
The circumference is 9.42 inches.