# What is the ratio of the circumference of a circle to its diameter?

##### 1 Answer
Sep 24, 2015

I found $\pi$

#### Explanation:

Consider that the circumference is $C = 2 \pi r$ and diameter is $d = 2 r$ so
$\frac{C}{d} = \frac{2 \pi r}{2 r} = \pi$