Circumference = 2*pi*r = 52.78 metres
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The circumference of a circle whose radius is 6 inches is: 37.7 inches.
Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 21.67698931 or 21.7 meters to the nearest tenth
Circumference = 2*pi*4 = 25.133 meters rounded to three decimal places
A circle with a radius of 3.3 units has a circumference of 20.73 units.
Multiply the radius by 2xpi.