Answer
Answer: $2\pi$ $\approx$ 6.28
Work Step by Step
First, we convert the 30° in radians with the equation:
$x° * \frac{\pi}{180}$
then,
$30° * \frac{\pi}{180}$ = $ \frac{\pi}{6}$
Then, knowing the equation to find the arc of a circle ($L$) is:
$L = angle\times radius$
we multiply the radians that we already found by the radius
$ \frac{\pi}{6}$ * radius = $ \frac{\pi}{6} * 12$ = $ \frac{12\pi}{6}$
This gives ${2\pi}$
