Four.
http://wiki.answers.com/Q/How_maney_vertices_are_i...

It has 8 regular hexagonal faces, 6 regular square faces, 24
http://www.chacha.com/question/howmanytruncated...

I'm trying to solve one of those crapper problems. Anyways, the tetrahedron looks like a triangle in 3 dimensional space. Picture this, a floating pyramid, that's it. Edit: Here's
http://answers.yahoo.com/question/index?qid=200811...

A tetrahedron has: 4 faces 6 edges 4 vertices
http://www.blurtit.com/q220327.html
