[math-fun] Why isn’t PentakisDodecahedron Johnson 93??

I see 6 triangles meeting at a vertex. If the triangles are regular, then either they are coplanar or the polyhedron is concave. Tom Bill Gosper writes:

Johnson 93? <https://www.wolframcloud.com/objects/810fbe92-6ab3-480b-9f86-e4869990cf46> —rwg And why can't we tumble that figure? _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun