â¢ Egyptian Hieroglyphs keyboard (more than 5000) â¢ Egyptian keyboard (Latin alphabet) for transliteration â¢ WikiHiero: online keyboard to type the Hieroglyphs (in several images) â¢ EgyptianHieroglyphs: Middle Egyptian lessons â¢ Gardiner's sign list â¢ Hieroglyphs lessons by Jacques Kinnaer â¢ Friesian school: pronunciation of the Egyptian language â¢ Hieroglyphs classified by category (Gardiner's sign list) â¢ Hieroglyphs classified by family, in colour (Gardiner list) â¢ Projet Rosette: hieroglyphs classified by family (Gardiner list) or transliteration
In elementary geometry, a polyhedron (plural polyhedra or polyhedrons) is a solid in three dimensions with flat polygonal faces, straight edges and sharp corners or vertices. The word polyhedron comes from the Classical Greek ÏÎ¿Î»ÏÎµÎ´ÏÎ¿Î½, as poly- (stem of ÏÎ¿Î»ÏÏ, many) + -hedron (form of á¼Î´ÏÎ±, base or seat).olyhedra with congruent regular faces of six or more sides are all non-convex, because the vertex of three regular hexagons defines a plane. The total number of convex polyhedra with equal regular faces is thus ten, comprising the five Platonic solids and the five non-uniform deltahedra.
A dodecahedron is any polyhedron with twelve faces, but usually a regular dodecahedron is meant: a Platonic solid composed of twelve regular pentagonal faces, with three meeting at each vertex. It has twenty (20) vertices and thirty (30) edges. Its dual polyhedron is the icosahedron. If one were to make every one of the Platonic solids with edges of the same length, the dodecahedron would be the largest.