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Re: What's a 9,11,12,etc-sided figure called?
Posted:
May 30, 2006 11:14 AM
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the only ones I can remember with any certainty:
9 sides: nonagon
11 sides: undecagon (although I think there is another name)
12 sides: dodecagon
15 siees: pentadecagon
Remember that the general polygon of n sides is called an n-gon, so you are always safe to use the terminology "12-gon, 15-gon, etc."
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