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# Cross-Sections and Nets

## Cross-sections are intersections of a plane with a solid, and nets are unfolded, flat representations of the sides of a 3-D shape.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Cross-Sections and Nets

by CK-12 //at grade

Draw two-dimensional representations of solid figures

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## Nets of Solid Figures

by CK-12 //at grade

Discover how to match a solid figure to its net and a net to its solid figure.

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• PLIX

## Cross-Sections and Nets: Cereal Box Grid

by CK-12 //at grade

Cross-Sections and Nets Interactive

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• Video

## Cross Sections and Nets Principles

by CK-12 //at grade

This video gives more detail about the mathematical principles presented in Cross Sections and Nets.

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• Video

## Cross Sections and Nets Examples

by CK-12 //at grade

This video shows how to work step-by-step through one or more of the examples in Cross Sections and Nets.

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• Practice
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## Cross-Sections and Nets Practice

by CK-12 //at grade
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• Critical Thinking

## Cross-Sections and Nets Discussion Questions

by CK-12 //at grade

A list of student-submitted discussion questions for Cross-Sections and Nets.

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## Cross-Sections and Nets Post Read

by CK-12 //at grade

To activate prior knowledge, to generate questions about a given topic, and to organize knowledge using a KWL Chart.

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## Cross-Sections and Nets Pre Read

by CK-12 //at grade

To activate prior knowledge, to generate questions about a given topic, and to organize knowledge using a KWL Chart.

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## Cross-sections and Nets Ask, Answer, Learn Table

by CK-12 //at grade

Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.

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## Draw Two-Dimensional Representations of Solid Figures Post Read

by CK-12 //at grade

Develop understanding of concepts by studying them in a relational manner. Analyze and refine the concept by summarizing the main idea, creating visual aids, and generating questions and comments using a Four Square Concept Matrix.

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• Real World Application

## Hold the Mail!

by CK-12 //at grade

Watch as a Priority Mail package is constructed from its net into a box.

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• Real World Application

## Origami in Outer Space

by CK-12 //at grade

Learn about the geometry that links the craft of origami to aerospace engineering.

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• Real World Application

## Womb with a View

by CK-12 //at grade

Learn how cross-sections are used to create 3D and 4D ultrasounds.

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• Real World Application

## The Body Factory?

by CK-12 //at grade

Discover how 3D printing will revolutionize medicine.

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• Study Guide

## Representing Solids Study Guide

by CK-12 //at grade

This study guide gives an overview of isometric view, orthographic view, cross section, and nets.

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