# What is the circumference of a circle with a radius of 4?

The circumference is a closed curve where all points are at the same distance from the center.

## Answer: 8 π

The circumference of a circle is its boundary or the length of the complete one of a circle.

**Explanation:**

Calculate the circumference of a circle is by using the formula 2 π r, where r is the radius of the circle.

2 π r = 2 π × 4 = 8 π