Slice up solids. A portion of a geometry playlist introduces two conventional ways to visualize 3-D figures in 2-D. The resource defines cross-sections and nets and provides examples of both.

Concepts

cross section, 3-d, 3-d figures, 2-d, 2-d shapes, nets, prisms, rectangular prisms, solids

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Additional Tags

math

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Instructional Ideas

• Lead a discussion on the minimum and maximum number of sides possible for slices of different solids
• Provide a solid and have the class find all its nets

Classroom Considerations

• Requires pupils to know the names of different 2-D shapes

• This video is hosted on YouTube

Pros

• Uses colors to help identify the faces of solids in the net
• Contains a link to more cross-section and net resources

Cons

• None

Common Core

6.G.A.4 7.G.A.3 HSG-GMD.B.4 MP2