1. A two-person tent is to be made so that the height at the center is a = 4 feet (see the figure below). If the sides of the tent are to meet the ground at an angle α = 60°, and the tent is to be b = 10 feet in length, how many square feet of material will be needed to make the tent? (Assume that the tent has a floor and is closed at both ends, and give your answer in exact form.)
2. The length of each edge of the cube shown in figure is 9 inch.
Find the length of diagonal CH.
Find the length of diagonal CF.
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