The circumference of a circle with a radius of 2 is: 12.57 units.
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The circumference of a circle if the radius is 2 feet is: about 12.57 feet.
2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi
Circumference of a circle = 2*pi*radius or diameter*pi
The ratio of the circumference to the radius of the circle is 2 times pi
Circumference of a circle = 2*pi*radius Circumference = 2*pi*5.6 = 35.18583772 units