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Prism (geometry)

In geometry, an n-sided prism is a polyhedron made of an n-sided polygonal base, a translated copy, and n faces joining corresponding sides.

Thus these joining faces are parallelograms.

All cross-sections parallel to the base faces are the same.

A right prism is a prism in which the joining edges and faces are perpendicular to the base faces.

This applies if the joining faces are rectangular.

Note:   The above text is excerpted from the Wikipedia article "Prism (geometry)", which has been released under the GNU Free Documentation License.
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