John what's a build a slide for his daughters tree house. The slide is made from aluminium material that is cut from a roll. The aluminium material is sold by the foot. The tree house is 6ft off the ground and he wants the slide to be built at a 60 degree angle. Triangle PQR is a right triangle. How much aluminium material does he need to purchase for the slide? 60° and 6 ft Answers 7ft 8ft 9ft 10ft