# What is the circumference of a circle with a radius of 13 centimeters?

Jun 11, 2017

$c = 26 \pi$ or $c \approx 81.68$

#### Explanation:

The formula for finding the circumference of a circle is:

$c = \pi d$

Thus, the only variable we really need to convert is the radius. We know that the formula for converting radius to diameter is:

$2 r = d$

Finally, all we need to do is plug in the values:

$c = \pi d$
= $c = \pi \cdot 26$
= $c \approx 81.68$

All the best!