# A circle has a radius of 6 cm. What is its circumference?

Dec 26, 2016

$37.699 c m$

#### Explanation:

The circumference of a circle can be obtained by using the equation below:

where the mathematical constant, $\pi$, has a value of approximately 3.14 and $r$ represents the radius of the circle.

All we have to do is multiply the given radius by two and multiply that value by $\pi$ to determine C:

$\text{Circumference} = 2 \times 6 c m \times \pi$
$\text{Circumference} = 12 c m \times \pi$
$\text{Circumference} = 37.699 c m$