Pentahedron
polyhedron with five faces
In geometry a pentahedron is a polyhedron of five faces. With regular polygon faces, there are two types:
- With a regular pyramid shape, there is a classical square pyramid.
- With a triangular prism there are two triangles and three squares.
![](http://up.wiki.x.io/wikipedia/commons/thumb/5/53/Square_pyramid.png/150px-Square_pyramid.png)
![](http://up.wiki.x.io/wikipedia/commons/thumb/2/21/Triangular_prism.png/120px-Triangular_prism.png)