tetrahedron

Also known as 3-simplex, triangular pyramid

thumb|A tetrahedron.

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Wikidata facts

Instance of: polyhedron
Followed by: square pyramid
Diameter: 1
Image: Tetrahedron.svg
Has parts of class: vertex

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maintained by WikiProject: WikiProject Mathematics
has facet polytope: triangle
Commons category: Tetrahedron
has vertex figure: triangle
Conway polyhedron notation: Y3
has characteristic: sphericity
different from: regular tetrahedron
studied by: category theory
described by source: Encyclopædia Britannica 11th edition
dual to: tetrahedron

Sources (3)

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Encyclopedic overview

25 sections

Contents

Regular tetrahedron
Irregular tetrahedra
Disphenoid
Orthoschemes
Space-filling tetrahedra
Fundamental domains
Subdivision and similarity classes
General properties
Volume
Algebraic approach
Other approaches
Analogous to a triangle
Trigonometry and the space of all shapes
Interior point
Inradius
Circumradius
Circumcenter
Integer tetrahedra
Applications
Related topics
See also
Notes
References
Bibliographies
External links

thumb|A tetrahedron.

In geometry, a tetrahedron (: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra.

Excerpted from Wikipedia’s “tetrahedron” article, available under the CC BY-SA 4.0 licence.

tetrahedron

Wikidata facts

Encyclopedic overview

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