Dictionary
search :       browse : 
A B C D E F G H I J K L M
  N O P Q R S T U V W X Y Z
         
Description
Related Terms
Everyday Examples
Interactive Checkpoint
More Information
Challenge
How to use this dictionary
Contact
 Description  
 Tetrahedron:  A regular polyhedron whose four faces are congruent equilateral triangles.
An tetrahedron is one of only 5 Platonic Solids. The other 4 are the cube, octahedron, dodecahedron and icosahedron.

 

This is an example of a tetrahedron.