Difference between revisions of "Tetrahedron"
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| − | The '''tetrahedron''' or ''triangular pyramid'' is the simplest [[polyhedron]]. Tetrahedra | + | The '''tetrahedron''' or ''triangular pyramid'' is the simplest [[polyhedron]]. Tetrahedra have 4 [[vertex|vertices]], 4 [[triangle | triangular]] [[face]]s and 6 [[edge]]s. 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 triangle]]s, are one of the five types of [[Platonic solid]]s. | |
Revision as of 07:46, 19 July 2007
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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.
