What is a polyhedron?

First we define a polygon. This is a flat area surrounded by straight lines for example:
triangle square hexagon
A Polyhedron is the 3-dimensional version of a polygon.
It is made by joining polygons along their edges. For example six squares can be joined to form a cube:


Other examples of polyhedra can be found here.
There are many books on polyhedra; here is a list of some of the ones we have used.

Why are Polyhedra useful?

Page last updated 11 September 2003
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