# What is circumference of 15 inch diameter?

Mar 21, 2018

$47.1$ $\text{in}$

#### Explanation:

The formula for finding the circumference of a circle is:

$2 \pi r$ or, since they gave you the diameter of your circle, we can simplify it to: $\pi d$

Plugging values into the equation, we get:
*(Remember: pi is approximately 3.14)

$\pi d \rightarrow \pi \left(15\right) \rightarrow 3.14 \left(15\right)$

Now multiply:
$3.14 \left(15\right) = 47.1$ $\text{in}$