Dodecahedron
What is the dodecahedron?
The dodecahedron is one of the 5 regular polyhedra. It has the following properties:
Vertex figure: 5.5.5
Faces: 12
Edges: 30
Vertices: 20
Characteristic: 2
More information can be found here: https://en.wikipedia.org/wiki/Regular_dodecahedron