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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
6. Cross Sections of Three-Dimensional Figures
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Exercise 8 Page 443

Think of a plane that intersects all but one face of a cube.

Possible

Practice makes perfect
Let's determine whether we can get a pentagon as a cross section from a cube.
A cube

A plane creating such a cross section has to intersect exactly five faces of the cube. For this reason, let's think of a plane that intersects all but the bottom face of a cube.

Equilateral triangle as a cross section

The shape formed by this plane is a pentagon. Therefore, it is possible to get a pentagon as a cross section from a cube.

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arrow_right Try It p.440-441
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Try It 4 (Page 441)
arrow_right Self-Assessment for Concept & Skills p.441
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Self-Assessment for Concept & Skills 6 (Page 441)
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arrow_right Self-Assessment for Problem Solving p.442
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arrow_right Review & Refresh p.443
Review & Refresh 1 (Page 443)
Review & Refresh 2 (Page 443)
Review & Refresh 3 (Page 443)
Review & Refresh 4 (Page 443)
arrow_right Concept, Skills, & Problem Solving p.443-444
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Concept, Skills, & Problem Solving 6 (Page 443)
Concept, Skills, & Problem Solving 7 (Page 443)
Concept, Skills, & Problem Solving 8 (Page 443)
Concept, Skills, & Problem Solving 9 (Page 443)
Concept, Skills, & Problem Solving 10 (Page 443)
Concept, Skills, & Problem Solving 11 (Page 443)
Concept, Skills, & Problem Solving 12 (Page 443)
Concept, Skills, & Problem Solving 13 (Page 443)
Concept, Skills, & Problem Solving 14 (Page 443)
Concept, Skills, & Problem Solving 15 (Page 443)
Concept, Skills, & Problem Solving 16 (Page 443)
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