Circumference = pi * diameter ---> Diameter = Circumference / pi. Radius = Diameter / 2.
Taking pi approx 3.14: Dia = 31.4 cm / 3.14 = 10.0 cm. Radius = 10.0 cm /2 = 5.00 cm.
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The circumference of a circle whose radius is 6 inches is: 37.7 inches.
The area of a circle whose radius is 19 centimeters is: 1,134 cm2
A circle with a radius of 3.3 units has a circumference of 20.73 units.
Multiply the radius by 2xpi.
537.48377......