Tetrahedron
A tetrahedron has 4 triangular faces, 6 edges and 4 vertices.
This image of a tetrahedron was created by
Tom Gettys
using the program
Persistence of Vision.
See also
Transparent Tetrahedron,
Hexahedron,
Octahedron,
Dodecahedron,
Icosahedron,
Platonic Solid