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Number of edges on a triangular prism

How many edges are there on a triangular prism?

9

Everyone knows that in geometry a triangular prism is a three-sided prism.   Needless to say, a triangular prism is a polyhedron made of a triangular base, a translated copy, and 3 faces joining corresponding sides.  There are 9 edges on a triangular prism.  It is also important to know that the three faces of a triangular prism are parallelograms.  Moreover, all cross-sections parallel to the base faces are the same triangle.

This fact is verified on : October 14, 2013.





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