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Math Trek

A Polyhedron with a Hole

By
3:00pm, January 18, 2007

For most people, the word "polyhedron" conjures up an image of a cube, a tetrahedron, or something similar—a solid figure with flat faces. If the polyhedron is regular, each face has the same size and shape.

But polyhedra come in all sorts of guises. The faces of a polyhedron can have different sizes and shapes, just as long as each one is a polygon. The polyhedron itself can have a hole (or two or more).

One particularly intriguing polyhedron was

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