Tetrahedron is one of only five Platonic solids. This is a regular polyhedron with 4 vertices, 6 edges, and 4 faces. All faces are triangular and at every vertex meet three faces and three edges.

What if applet does not run?

Drag the mouse to rotate the tetrahedron. Use the right button to remove and put back individual faces.

(Acknowledgement: I have learned most of Java details from the implementation by Meiko Rachimow.)

Tetrahedron (tetra = 4 in Greek) is one of the five Platonic solids, the other being cube, octahedron, dodecahedron, icosahedron. Tetrahedron is a triangular pyramid. With 4 faces, 6 edges, and 4 vertices it confirms to the Euler's theorem: 4 - 6 + 4 = 2.

Related material

  • Right Pentagonal Prism
  • Square Pyramid
  • Right Triangular Prism
  • Twisted Triangular Prism
  • Octahedron: an Interactive Model
  • Cube: an Interactive Model
  • Icosahedron: an Interactive Model
  • Dodecahedron: an Interactive Model
  • Three Pyramids are Better Than Two
  • Cube In Octahedron
  • Octahedron In Cube
  • Octahedron In Tetrahedron
  • Tetrahedron In Cube
  • Icosahedron In Cube
  • Great Stellated Dodecahedron
  • Lennes' Polyhedron
  • Triangulated Dinosaur
  • Volumes of Two Pyramids
  • Császár Polyhedron 1
  • Császár Polyhedron 4
  • Szilassi Polyhedron
  • Dissection of a Square Pyramid
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    Copyright © 1996-2017 Alexander Bogomolny


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