An Irregular Pentagonal Dodecahedron

This is an example of an irregular pentagonal dodecahedron. Although there are twelve congruent pentagons on this dodecahedron, the pentagons are not regular. Only four of the sides on each pentagon have the same length.

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.

• How to build a model.
• George Hart describes irregular pentagonal dodecahedra.
• Vladimir Bulatov's stellations of an irregular pentagonal dodecahedron.