The tetrahedron is the simplest of all polyhedra. Any four points in space that are not all on the same plane mark the corners of four triangles. The triangles in turn are the faces of a tetrahedron.
For more than 30 years, Arthur Silverman of New Orleans has created artworks arising out of explorations of this angular form. Many of his sculptures are on display in public spaces and various buildings in New Orleans and other cities from Florida to California.