## Prealgebra (7th Edition)

The distance around the crater is the circumference of the crater Circumference = $\pi$ $\times$ diameter = $\pi$ $\times$ d Circumference = $\pi$ $\times$ 4000 = 4000$\pi$ feet The approximation of the circumference = 4000 $\times$ 3.14 = 12560 feet