What is circumference of the circle?

Circumference of the circle is also called perimeter of the circle, it’s the distance around the circle.

Depending on the information provided, one of two formulas is employed to calculate the circumference, C.

 The Greek letter, which represents the irrational number Pi, is used in both circumference formulas. Pi is both a mathematical constant and the ratio of a circle's circumference to its diameter.

Circumference of the circle is given by: $2\pi r$

Where, r is the radius of the given circle.