radius = 1, C=2(pie)r
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Circumference = 2 x pie x radius Therefore, radius = 10/2/pie =1.6
(pie)(diameter)=(circumference) (pie)(9)(2)=18(pie)=56.549
Circumference of a circle = 2*pi*radius or diameter*pi Its diameter = circumference/pi
[2 x pie x radius] or [pie x diameter]
The circumference of a circle with a radius of 2 is: 12.57 units.