Polyhedra regular
In geometry, flat-faced solids are called "polyhedra." (In Greek, polys = "multiple" and Hedra = "face".) Polyhedra whose faces are equal regular polygons are called regular polyhedra . There are five regular polyhedrons:
- hexahedron (6 square)
- Tetrahedron (4 equilateral triangles)
- Dodecahedron (12 regular pentagons)
- Icosahedron (20 equilateral triangles)
- Octahedron (8 equilateral triangles)
- Here is a picture of these polyhedra
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