Other Free Encyclopedias » Science Encyclopedia » Science & Philosophy: Swim bladder (air bladder) to Thallium



A tetrahedron is a polyhedron with four triangular faces. It is determined by four points (the vertices) that are not all in the same plane. A regular tetrahedron is one where all of the faces are congruent equilateral triangles.

A tetrahedron is the same as a pyramid with a triangular base.

See also Polygons.

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or