Posted by ceilia on Saturday, December 15, 2007 at 5:43pm.
decagon??
Yes, a star, no matter how many sides it has, is still a polygon. Check these sites.
http://www.mathleague.com/help/geometry/polygons.htm#polygon
http://en.wikipedia.org/wiki/Polygon
And yes, a five-pointed star, like the ones in the U.S. flag, is one type of decagon.
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