# The radius of a circle is 5.5 cm. What is the circumference in meters?

Nov 5, 2015

C = 0.11$\pi$ or 0.3456 m

#### Explanation:

To find circumference of a circle when you have the radius, you use the formula C = 2$\pi$r. In this question r = 5.5 cm but because we want centimeters, we use r = 0.055 m. C = 20.055$\pi$ = 11$\pi$. Some teachers let you leave $\pi$ in the answer, if they don't, it multiplies out to 0.3456 m.

Nov 5, 2015

34.55 cm or.345 meters