anonymous 5 years ago How do you find the circumference of a circle

The circumference of a circle given the radius is defined as $$2\pi r$$.

2. anonymous

ok. in the circle there is 5cm. How do I figure this

If 5cm is the radius, then you multiply it by $$2\pi$$. If it is the diameter, then the radius is 1/2 of that number.

4. anonymous

so the answer would be 15.7

Sounds right :)

6. anonymous

thanks! you are the bomb diggity