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6-8 Accelerated 6 Unit 1 Lesson 10

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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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Accelerated 6
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Unit 3
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Unit 6
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Lesson 2
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Lesson 12
Lesson 13

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

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Unit 1, Lesson 10

What Is Surface Area?

Accelerated 6

Practice

Problem 1

What is the surface area of this rectangular prism?

2 by 4 by 4 unit rectangular prism

16 square units
32 square units
48 square units
64 square units

Problem 2

Which description can represent the surface area of this trunk?

<p>Photograph of a treasure chest</p>

The number of square inches that cover the top of the trunk.
The number of square feet that cover all the outside faces of the trunk.
The number of square inches of horizontal surface inside the trunk.
The number of cubic feet that can be packed inside the trunk.

Problem 3

Which figure has a greater surface area?

5 cubes arranged in L shape. — A

5 cubes arranged in a cross shape. — B

Problem 4

A rectangular prism is 4 units high, 2 units wide, and 6 units long. What is its surface area in square units? Explain or show your reasoning.

Problem 5

ForLesson 8: Formula for the Area of a Triangle

Draw an example of each of these triangles on the grid.

A right triangle with an area of 6 square units.
An acute triangle with an area of 6 square units.
An obtuse triangle with an area of 6 square units.

Image of a grid.

Problem 6

ForLesson 3: Reasoning to Find Area

Find the area of this shape. Show your reasoning.

<p>A four-sided shape on a grid, with two sides that drop 5 units as they cross 5 units and meet at a right angle, and two sides that drop two units as they cross 5 units.</p>