Talk:Prismatoid

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[edit] pentagrammic crossed-antiprism

Is the 4th object pictured, the pentagrammic crossed-antiprism, really a prismatoid? If so, why? It seems to have vertices in places other than the two parallel planes. mg 17:00, 30 November 2007 (UTC)

See Prismatic uniform polyhedron for more examples. There's just two planes of vertices, but the edges intersect so it may look like there's more vertices - just like the pentagram has 5 vertices but could be 10 if you thought there was vertices at the intersections. Tom Ruen 18:06, 30 November 2007 (UTC)