The formula for working out the circumference of a circle is. Finally you can find the diameter - it is simply double the radius. P Pi 314159 o Circle diameter.
Therefore the formula for finding out the circumference of the circle is Circumference of circle p x Diameter of circle which we typically write in the short form as C pd.
In this equation C represents the circumference of the circle and d represents its diameter. 2 x p x radius where p is a mathematical constant equal to about 314159. You can use a two-step process solving first for the radius using the formula for the circumference. P Pi 314159 o Circle diameter.