Three Dimensions in Two Dimensions: Lesson

This Three Dimensions in Two Dimensions: Lesson video also includes:

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.

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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
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