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Encyclopedia: List of mathematical shapes (1537 words) |
 | In geometry, an enneagon or nonagon is a nine-sided polygon. |
 | In geometry, the 120-cell, or hecatonicosachoron, is the convex, regular polychoron (a 4-dimensional polytope) with 120 cells (or facets). |
 | See also: List of mathematical topics The word esoteric generally relates to that which is known only by a restricted number of people (contrast exoteric). |