Dodecahedron

A regular dodecahedron is a regular polyhedron formed by $12$ equal regular pentagons.

If we develop the dodecahedron, we obtain the following figure:

The properties of the octahedron are:

• Number of faces: $12$
• Number of vertexes: $20$
• Number of edges: $30$
• Number of edges meeting in each vertexes: $3$