geometry
posted by ceilia .
a star, is it a polygon? if it is name it by the num,ber of sides... 10 sides i beilieve?

geometry 
Lena
decagon??

geometry 
Ms. Sue
Yes, a star, no matter how many sides it has, is still a polygon. Check these sites.
(Broken Link Removed)
http://en.wikipedia.org/wiki/Polygon 
geometry 
drwls
And yes, a fivepointed star, like the ones in the U.S. flag, is one type of decagon.
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