Grade 6 | Unit 1 | Lesson 15: More Nets, More Surface Area | Practice Problems

Jada drew a net for a polyhedron and calculated its surface area. Description: Triangular prism, Faces are: 5 by 4 rectangle, area 20 square centimeters. 4 by 4 square, area 16 square centimeters, 2 triangles, bases of 5, heights of 3, areas of 12 square centimeters each, and 3 by 4 rectangle, area = 12 square centimeters. What polyhedron can be assembled from this net? Jada made some mistakes in her area calculation. What were the mistakes?

• Cube

• Triangular prism

• Sphere

• Cylinder

• Rectangular prism

Find the surface area of the polyhedron. Show your reasoning.

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A cereal box is 8 inches by 2 inches by 12 inches. What is its surface area? Show your reasoning.

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Twelve cubes are stacked to make this figure. What is its surface area? How would the surface area change if the top two cubes are removed?

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Here are two polyhedra and their nets. Label all edges in the net with the correct lengths.

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What three-dimensional figure can be assembled from the net? What is the surface area of the figure? (One grid square is 1 square unit.)

• Cube

• Square pyramid

• Sphere

• Cylinder

• Rectangular prism