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In formal geometry, a star is a set of $2n$ Vectors $\pm{\bf a}_1$, ..., $\pm{\bf a}_n$ which form a fixed center in Euclidean 3-Space. In common usage, a star is a Star Polygon (i.e., regular convex polygon) such as the Pentagram or Hexagram

See also Cross, Eutactic Star, Star Figure, Star Polygon

© 1996-9 Eric W. Weisstein