Math
posted by Brandi .
Need help on the question below.
A pool has a diameter of 12 ft. There is a sidewalk that extends 3 ft out from the side of the pool. How many feet of fencing will be needed to go around the sidewalk?
Thanks...

You need fencing to go around a circle with a diameter of 18 feet.
C = 3.14 * 18
C = ?