Tetrahedron

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A rotating tetrahedron

A tetrahedron (triangular pyramid) is a three-dimensional shape. It has four corners. It looks like a pyramid. It has six equally long edges, four corners and four equilateral triangular faces. Every two edges meet on one of those corners forming a sixty-degree angle. All of its sides are triangles.

Formulas for a regular tetrahedron[change | change source]

A regular tetrahedron is a tetrahedron where all of its edges are the same length. If the length of an edge is a:

Surface area[1]
Face area
Height[2] and
Volume[1] and

References[change | change source]

  1. 1.0 1.1 Coxeter, Harold Scott MacDonald; Regular Polytopes, Methuen and Co., 1948, Table I(i)
  2. Köller, Jürgen, "Tetrahedron", Mathematische Basteleien, 2001