# Circumference and Area of a Circle

A circle consists of all points in a plane that are the same distance from a fixed point called center. The distance between the center and any point on the circle is the radius. The distance across the center is the diameter.

The circumference of a circle is the distance around the circle. For a circle, the ratio of its circumference to its diameter is an irrational number that is approximately equal to 3.14.

Read the explanation below to learn more about circumference and area of a circle.

Circumference and Area of a Circle

**Practice:** Answer the following exercises about circumference and area of a circle.