What is the circumference of 7 cm?

To find the circumference of a circle, you can use the formula ( C = 2\pi r ), where ( r ) is the radius. If the radius is 7 cm, then the circumference is ( C = 2\pi(7) ), which is approximately ( 43.98 ) cm when using ( \pi \approx 3.14 ). If the diameter is 7 cm, the circumference would be ( C = \pi(7) ), approximately ( 21.99 ) cm.