circumference of a circle = 2*pi*radius or diameter*pi
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A circumference of 21.99 cm
The radius is 7cm
Assuming that what you mean is that the diameter is 7cm...Pi x 7 = 21.99114858C = 22
Circumference of the circle: 2*pi*7 = 44 cm rounded up to the nearest whole number
http://wiki.answers.com/What_is_the_circumference_of_a_circle_with_a_radius_of_7cmhttp://wiki.answers.com/What_is_the_circumference_of_a_circle_with_a_radius_of_7cm