Difference between revisions of "Tetrahedron"
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Regular tetrahedra, in which all edges have equal [[length]] and all faces are [[congruent]] [[equilateral triangle]]s, are one of the five types of [[Platonic solid]]s. | Regular tetrahedra, in which all edges have equal [[length]] and all faces are [[congruent]] [[equilateral triangle]]s, are one of the five types of [[Platonic solid]]s. | ||
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Revision as of 09:33, 6 November 2007
This article is a stub. Help us out by expanding it.
The tetrahedron or triangular pyramid is the simplest polyhedron. Tetrahedra have 4 vertices, 4 triangular faces and 6 edges. 3 faces and 3 edges meet at each vertex.
Any 4 points chosen in space will be the vertices of a tetrahedron as long as they do not all lie on a single plane.
Regular tetrahedra, in which all edges have equal length and all faces are congruent equilateral triangles, are one of the five types of Platonic solids.
