# How do you find the circumference of a circle with a diameter of 3 inches?

Jun 3, 2018

$3 \pi$ inches or about $9.42$ inches(rounded to nearest hundredth's place)

#### Explanation:

The formula for the circumference of a circle is $2 \pi r$ where $r$ is the radius, or $\pi d$ where $d$ is the diameter.

In this problem, we are given the diameter, so we can use the $\pi d$ formula to find the circumference. Plug in $3$ for the diameter:
$\pi \left(3\right) = 3 \pi$ inches

If you want to simplify this even further, we know that $\pi \approx 3.14$, so $3 \left(3.14\right) = 9.42$ inches(rounded to nearest hundredth's place)

Hope this helps!