The Regular Dodecahedron

The regular dodecahedron has twelve regular pentagonal faces. It is one of the five Platonic solids.

To build this model, note that two tabs sometimes share an edge at vertices of the net where three pentagons meet. If you cut along these edges and glue these pairs of tabs first, you should see how to complete the model.

You may notice that this is not the usual net for the regular dodecahedron. What can you learn by comparing it with the net for the convex irregular pentagonal dodecahedron?

• How to build a model.
• Herman Serras explores the regular dodecahedron and icosahedron.
• Steve Dutch explains why there are only five Platonic solids.
• Read The Math Forum's discussion of the Platonic solids.