4. Find the arc length.
![4 Find the arc length class=](https://us-static.z-dn.net/files/d75/c377b7cc0300b5274aab86bd647b521a.png)
Find the circumference:
8km x 2 x 3.14 = 50.24 km
Arc length = 50.24 x 225/360 = 31.4 km
answer: C. 10 pi or 31.4 km