PentagramDate: 12/08/2001 at 13:09:15 From: Stephanie Shipwash Subject: Polygons Is a 5-pointed star (on a flag), a decagon, or just 5 triangles? Thanks, Stephanie Date: 12/08/2001 at 13:18:20 From: Doctor Sarah Subject: Re: Polygons Hi Stephanie - thanks for writing to Dr. Math. See George Hart's Web page on Pentagrams: http://www.georgehart.com/virtual-polyhedra/pentagram.html "Pentagrams are "five-pointed stars." They are regular polygons with five vertices and five edges; that's all. The sides just happen to cross each other at five points of intersection which outline the small interior pentagon, but those are not vertices and the smaller segments are not complete sides. Mathematically, the pentagram is special for being the simplest nonconvex regular polygon." - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
Search the Dr. Math Library: |
[Privacy Policy] [Terms of Use]
Ask Dr. Math^{TM}
© 1994- The Math Forum at NCTM. All rights reserved.
http://mathforum.org/dr.math/