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6-8 Accelerated 6 Unit 1 Lesson 12

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K-5 Math •6-8 Math 9-12 Math

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•Accelerated 6 Accelerated 7

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•Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 Unit 9

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 •Lesson 12 Lesson 13

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9-12

Accelerated 6
Accelerated 7

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Unit 2
Unit 3
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Unit 6
Unit 7
Unit 8
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Lesson 1
Lesson 2
Lesson 3
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Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11
Lesson 12
Lesson 13

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Curriculum

IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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Unit 1, Lesson 12

More Nets, More Surface Area

Accelerated 6

Practice

Problem 1

Jada drew a net for a polyhedron and calculated its surface area.

<p>Triangular prism, dimensions and areas of faces provided.</p>

What polyhedron can be assembled from this net?
Jada made some mistakes in her area calculation. What were the mistakes?
Find the surface area of the polyhedron. Show your reasoning.

to access Practice Problem Solutions.

Lesson 12 Resources

Student Materials

Problem 2

A cereal box is 8 inches by 2 inches by 12 inches. What is its surface area? Show your reasoning. If you get stuck, consider drawing a sketch of the box or its net and labeling the edges with their measurements.

to access Practice Problem Solutions.

Problem 3

ForLesson 10: What Is Surface Area?

Twelve cubes are stacked to make this figure.

Steps, bottom row 3 cubes, middle row 2 cubes, top row 1 cube.

What is its surface area?
How would the surface area change if the top two cubes are removed?

to access Practice Problem Solutions.

Problem 4

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

Polyhedron A has sides labeled 5, 4, and 10. — A

Polyhedron B has sides labeled 4, 10, 13, 13, and 13. — B

A net of rectangular prism. — A

Net of rectangular pyramid. — B

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Problem 5

ForLesson 11: Polyhedra and Nets

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.)

to access Practice Problem Solutions.