A customer wants to make a teepee in backyard for his childrens. He plans to use lengths of PVC plumbing pipe for the suppports on the teepee,and he wants the teepee to be 10 feet across and 12 feet tall. How long should the pieces of PVC plumbing pipe be?
5^2+12^2 = 25 + 144 = 169
13^2 = 169 remarkably
13 + whatever overlaps and sticks out the top