This may sound like a fancy title, but it just means figures with flat sides and a hole in the middle!

In this investigation we built toroidal polyhedra like this:

Hexagonal torus

We observed that each of our shapes were made up of flat sides, line segments, and points. Then we counted each of these components and looked for patterns. Finally we took a look at classical polyhedra (without the hole in the middle) and compared the pattern for toroidal polyhedra with the pattern for classical ones.

Handouts from the session