A scout group is setting up a tent at camp. Because rain is predicted, the scouts decide to build a fly, or rain cover, over the tent. The fly will be 12 feet high and 16 feet wide. The scouts are building the frame for the fly with poles slanted to meet over the top of the tent. What is the minimum length of the poles needed to support the fly?
8 feet
13 feet
15 feet
18 feet
