Q:

# What is the formula for a circumference of a circle?

A:

The formula for the circumference of a circle is 2(pi)r. R stands for the radius of the circle, which can also be found by taking the diameter and dividing it by 2, and pi can be approximated by the decimal 3.14.

## Keep Learning

The circumference of a circle is also the perimeter of the circle. While very basic questions might ask a student to find the circumference of a circle given a certain radius, the circumference of a circle can also be required for more complicated problems. For example, the circumference of the Earth is needed to be able to solve for its linear velocity.

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