Paper Truncated Star Pyramids
Truncated Pentagrammic Pyramid (low):
Number of faces: 7
Number of edges: 15
Number of vertices: 10
Truncated Hexagrammic Pyramid:
Number of faces: 8
Number of edges: 18
Number of vertices: 12
Truncated Tetragonal Star:
Number of faces: 10
Number of edges: 24
Number of vertices: 16
Truncated Pentagonal Star Pyramid:
Number of faces: 12
Number of edges: 30
Number of vertices: 20
Truncated Pentagonal Star Pyramid (irragular):
Number of faces: 12
Number of edges: 30
Number of vertices: 20
Truncated Hexagonal Star Pyramid:
Number of faces: 14
Number of edges: 36
Number of vertices: 24
Truncated Octagonal Star Pyramid:
Number of faces: 18
Number of edges: 48
Number of vertices: 32
Definition of a Pyramid: A pyramid is a polyhedron with one face (known as the "base") a polygon and all the other faces triangles meeting at a common polygon vertex (known as the "apex"). A right pyramid is a pyramid for which the line joining the centroid of the base and the apex is perpendicular to the base. A regular pyramid is a right pyramid whose base is a regular polygon. An n-gonal regular pyramid (denoted Yn) having equilateral triangles as sides is possible only for n=3, 4, 5. These correspond to the tetrahedron, square pyramid, and pentagonal pyramid, respectively.
