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Foam Pyramids

More from my fun with folding series:  after having fun making paper pyramids, I thought I’d try out foam board as a medium.  As before, I began by connecting the midpoints of the sides of the triangle to form its medial triangle.

foam triangle

Then I scored the medial lines, bent, and taped!

foam pyramid 1

A rotation gives a sense of how oblique this pyramid is.

foam pyramid 2

My students and I enjoy exploring questions like “Will this procedure always produce a pyramid?” and “What other kinds of solids can be formed in this manner?”

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One Comment

  1. Tom Snow says:

    Are you able to fold out of cardboard a octahedron?

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