GUIDED PRACTICE Read and solve each problem. 1 What is the surface area of the three-dimensional object formed by The net is for a triangular prism. It this net? is made up of three 7 cm rectangles and two 8 cm triangles. 5 cm 24 cm- A 120 square centimeters C 176 square centimeters 131 square centimeters D 232 square centimeters 2 A wooden board in the shape of a rectangular prism has a length of 60 inches, a width of 4 inches, and a height of 2 inches. What is the Imagine a diagram surface area of this wooden board? of the board. How many rectangles A 368 square inches C 736 square inches would make up its net? What are their B 480 square inches D 960 square inches dimensions? 3 A toy chest will be assembled. The diagram shows a net of the unassembled chest. Gwen must buy whole cans of 2 ft wood protector. 12 ft 4 fi Gwen plans to apply a wood protector on all sides of the toy chest. One can of wood protector covers an area of 15 square feet. How many whole cans of wood protector will Gwen need to buy to cover this entire toy chest? Answer PLICATING THIS MATERIAL IS ILLEGAL UNIT 8 Geometry 145TEST YOURSELF Read and solve each problem. 1 Which two-dimensional figures make up the 3 A tent with a square-shaped base folds net of this three-dimensional object? down to this shape 8 ft 10 ft A 2 squares and 4 rectangles B 2 rectangles and 4 squares C 2 triangles and 4 rectangles D 2 rectangles and 4 triangles What is the surface area of the tent? 2 Which of the following nets can be folded to A 80 square feet form a cube? B 160 square feet C 260 square feet D 420 square feet B 4 Charlotte thinks the surface area of this jewelry box is 54 square inches. 3 in 4 in. 6 in. Is this the correct surface area? Explain how you know. 5 A gift box is in the shape of a cube. Each side of the gift box is 9 inches long. What is the surface area of the gift box? Show your work. Answer 146 UNIT 8 Geometry