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- Tetrahedron abstract "In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons) is a polyhedron composed of four triangular faces, three of which meet at each corner or vertex. It has six edges and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra and the only one that has four faces.The tetrahedron is the three-dimensional case of the more general concept of a Euclidean simplex.The tetrahedron is one kind of pyramid, which is a polyhedron with a flat polygon base and triangular faces connecting the base to a common point. In the case of a tetrahedron the base is a triangle (any of the four faces can be considered the base), so a tetrahedron is also known as a "triangular pyramid".Like all convex polyhedra, a tetrahedron can be folded from a single sheet of paper. It has two such nets.For any tetrahedron the vertices lie on a sphere (called the circumsphere) while another sphere (the insphere) just touches the tetrahedron's faces.".
- Tetrahedron thumbnail Tetrahedrons_cannot_fill_space..PNG?width=300.
- Tetrahedron wikiPageExternalLink paper.html.
- Tetrahedron wikiPageExternalLink tetrahedron.
- Tetrahedron wikiPageExternalLink applet.
- Tetrahedron wikiPageExternalLink Explicit_Exact_Formulas_f.html.
- Tetrahedron wikiPageExternalLink model.php?name_en=tetrahedron.
- Tetrahedron wikiPageExternalLink unipoly.
- Tetrahedron wikiPageExternalLink kyriannis_nyunet3.html.
- Tetrahedron wikiPageID "30606".
- Tetrahedron wikiPageRevisionID "603156614".
- Tetrahedron hasPhotoCollection Tetrahedron.
- Tetrahedron title "Euler points".
- Tetrahedron title "Monge point".
- Tetrahedron title "Tetrahedron".
- Tetrahedron urlname "EulerPoints".
- Tetrahedron urlname "MongesTetrahedronTheorem".
- Tetrahedron urlname "Tetrahedron".
- Tetrahedron subject Category:Deltahedra.
- Tetrahedron subject Category:Platonic_solids.
- Tetrahedron subject Category:Prismatoid_polyhedra.
- Tetrahedron subject Category:Pyramids_and_bipyramids.
- Tetrahedron subject Category:Self-dual_polyhedra.
- Tetrahedron comment "In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons) is a polyhedron composed of four triangular faces, three of which meet at each corner or vertex. It has six edges and four vertices.".
- Tetrahedron label "Czworościan".
- Tetrahedron label "Tetraeder".
- Tetrahedron label "Tetraedro".
- Tetrahedron label "Tetraedro".
- Tetrahedron label "Tetraedro".
- Tetrahedron label "Tetrahedron".
- Tetrahedron label "Tétraèdre".
- Tetrahedron label "Viervlak".
- Tetrahedron label "Тетраэдр".
- Tetrahedron label "رباعي سطوح".
- Tetrahedron label "三角錐".
- Tetrahedron label "四面體".
- Tetrahedron sameAs Čtyřstěn.
- Tetrahedron sameAs Tetraeder.
- Tetrahedron sameAs Τετράεδρο.
- Tetrahedron sameAs Tetraedro.
- Tetrahedron sameAs Tetraedro.
- Tetrahedron sameAs Tétraèdre.
- Tetrahedron sameAs Tetraedro.
- Tetrahedron sameAs 三角錐.
- Tetrahedron sameAs 사면체.
- Tetrahedron sameAs Viervlak.
- Tetrahedron sameAs Czworościan.
- Tetrahedron sameAs Tetraedro.
- Tetrahedron sameAs m.07jht.
- Tetrahedron sameAs Q160003.
- Tetrahedron sameAs Q160003.
- Tetrahedron wasDerivedFrom Tetrahedron?oldid=603156614.
- Tetrahedron depiction Tetrahedrons_cannot_fill_space..PNG.
- Tetrahedron isPrimaryTopicOf Tetrahedron.