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\begin{figure}\begin{center}\BoxedEPSF{PentagramLengths.epsf scaled 700}\end{center}\end{figure}

The Star Polygon $\{{\textstyle{5\over 2}}\}$, also called the Pentacle, Pentalpha, or Pentangle.

See also Dissection, Hexagram, Hoehn's Theorem, Pentagon, Star Figure, Star of Lakshmi


Ogilvy, C. S. Excursions in Geometry. New York: Dover, pp. 122-125, 1990.

Pappas, T. ``The Pentagon, the Pentagram & the Golden Triangle.'' The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, pp. 188-189, 1989.

Schwartzman, S. The Words of Mathematics: An Etymological Dictionary of Mathematical Terms Used in English. Washington, DC: Math. Assoc. Amer., 1994.

© 1996-9 Eric W. Weisstein