# What is the circumference of a circle with a radius of 9 cm?

Jan 6, 2016

$= 56.52 c m$

#### Explanation:

The formula for the circumference of a circle is
$= 2 \pi r$

The radius $= 9 c m$

circumference $= 2 \pi r$

$= 2 \times 3.14 \times 9$

$= 6.28 \times 9$

$= 56.52 c m$