**what is a polyhedron?
** Plato's five regular polyhedra
duality in the space |

**Archimedes' semi-regular polyhedra and the prisms and antiprisms
** animated truncations (tetrahedron, cube, dodecahedron) - snubs
Catalan's semi-regular polyhedra and the diamonds and antidiamonds
truncation's and extension's sequences - dual morphing - animated assemblages
Euler's polyhedral formula - technical information - other convex polyhedra |

**outstanding tetrahedra and tangent spheres - cuttings of a tetrahedron, of regular pyramids
** Hills' tetrahedra - dissections and Dehns' invariant
Johnson's polyhedra - Miller's polyhedron
canonical polyhedra - Schlegel diagrams
tetrahedrally truncated dodecahedron and stellated icosahedron
the tectohedra and sand heaps - tectohedra constructions
the convex deltahedra and hexahedra ( "cubic" and canonical models )
rhombic polyhedra - spherical polyhedra - Waterman's polyhedra |

**miscellaneous examples and animations** |