3-9 High Street, Millers Point 3-9 High Street, Millers Point 3-9 High Street, Millers Point are heritage-listed terrace houses located at 3, 5, 7, 9 High Street, in the inner city Sydney suburb of Millers Point in the City of Sydney local government area of New South Wales, Australia. The property was added to the New South Wales State Heritage Register on 2 April 1999. Millers Point is one of the earliest areas of European settlement in Australia, and a focus for maritime activities. These are a group of early twentieth century workman's terraces built as part of the post-bubonic plague redevelopment by the Sydney
9-orthoplex 9-orthoplex In geometry, a 9-orthoplex or 9-cross polytope, is a regular 9-polytope with 18 vertices, 144 edges, 672 triangle faces, 2016 tetrahedron cells, 4032 5-cells "4-faces", 5376 5-simplex "5-faces", 4608 6-simplex "6-faces", 2304 7-simplex "7-faces", and 512 8-simplex "8-faces". It has two constructed forms, the first being regular with Schläfli symbol {3,4}, and the second with alternately labeled (checkerboarded) facets, with Schläfli symbol {3,3} or Coxeter symbol 6. It is one of an infinite family of polytopes, called cross-polytopes or "orthoplexes". The dual polytope is the 9-hypercube or enneract. There are two Coxeter groups associated with the 9-orthoplex, one regular,