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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 //basic

Represent three-dimensional objects in two dimensions.

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• Video

## Nets - Overview

by CK-12 //basic

Overview

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• Video

## Three Dimensions in Two Dimensions Principles - Basic

by CK-12 //basic

This video provides the student with a walkthrough on three dimensions in two dimensions.

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• Video

## Three Dimensions in Two Dimensions Examples - Basic

by CK-12 //basic

This video provides the student with a walkthrough of one or more examples from the concept "Three Dimensions in Two Dimensions".

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• Video

## Geometry Nets

by CK-12 //basic

Learn about nets by "unfolding" a 3-dimensional figure.

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• Video

## Nets - Example 1

by CK-12 //basic

Determining whether a net will form a cube or cuboid when folded

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## Cross Section Flyer

by CK-12 //basic

This exciting interactive allows you to view different cross sections of many different figures on the coordinate plane. You can view different cross sections based off of selected positions on the x-, y-, and z-axes.

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## Unfolding Polyhedra

by CK-12 //basic

Have trouble visualizing polyhedra nets? Play around with this interactive to see the unfolding of a polyhedra at all angles.

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• Flashcards

## Polyhedrons, Cross-Sections, and Nets Flashcards

by CK-12 //basic

These flashcards help you study important terms and vocabulary from Polyhedrons and Cross-Sections and Nets.

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