A pentahedron is polyhedron having five faces. Because there are two pentahedral graphs, there are two convex pentahedra, corresponding to the topologies of the square pyramid and the triangular prism.

name | |||

5 | 5 | 8 | square pyramid |

5 | 6 | 9 | triangular prism |

The convex pentahedra are illustrated above, together with their skeletons and polyhedral graphs (i.e., duals of the skeletons).