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1 тетраэдр
1) Engineering: triangular pyramid2) Mathematics: tetrahedron, three-dimensional simplex3) Silicates: tetrahedral unit (структурная единица силикатов)
См. также в других словарях:
Polyhedron — Polyhedra redirects here. For the relational database system, see Polyhedra DBMS. For the game magazine, see Polyhedron (magazine). For the scientific journal, see Polyhedron (journal). Some Polyhedra Dodecahedron (Regular polyhedron) … Wikipedia
Noble polyhedron — A noble polyhedron is one which is isohedral (all faces the same) and isogonal (all vertices the same). They were first studied in any depth by Hess and Bruckner around the turn of the century (ca. 1900), and later by Grünbaum. Classes of noble… … Wikipedia
Dodecahedron — Regular Dodecahedron (Click here for rotating model) Type Platonic solid Elements F = 12, E = 30 V = 20 (χ = 2) Faces by sides 12{5} … Wikipedia
Cube — This article is about the geometric shape. For other uses, see Cube (disambiguation). Regular Hexahedron (Click here for rotating model) Type Platonic solid Elements F = 6, E = 12 V = 8 (χ = 2) … Wikipedia
Deltahedron — This is a truncated tetrahedron with hexagons subdivided into triangles. This figure is not a deltahedron since coplanar faces are not allowed within the definition. A deltahedron (plural deltahedra) is a polyhedron whose faces are all… … Wikipedia
Zonohedron — A zonohedron is a convex polyhedron where every face is a polygon with point symmetry or, equivalently, symmetry under rotations through 180°. Any zonohedron may equivalently be described as the Minkowski sum of a set of line segments in three… … Wikipedia