What are other ways to represent a 3d shape in two dimensions?  We saw last class that you can use one of several different views, but we can also take the shape and look at its "skin".  When you cut a polyhedron along some of its edges to lay it flat, we get a net:


  • Notes: 5.2 Nets
  • Triangular Prism
  • Rectangular Prism

Fun Ideas with Nets and Networks

Pre-Class Assignment:

  • Before next class, read through the notes and copy them down into your notebook.
  • Think about the following 2 questions:
    • Do you think a net is more or less effective at representing a 3d shape two dimensionally than the 3 views?
    • Is there a way to figure out how many faces, vertices and edges a shape will have by looking at its net?  Use the examples of the triangular prism and the rectangular prism to help you.

In-Class Assignment:

  • P173 #3, 4, 6, 7, 8, 9, *12 *13
  • Koninsberg Network Problem
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