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The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
A simple formula to calculate the circumference of a circle: so in this case:
Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle
Circumference = diameter*pi
The circumference of EVERY circle is (pi) times (the diameter).Now you can calculate the circumference of not only that particular circle, butalso the circumference of any other circle that you'll ever meet in the future.