Polygons and Circles
Date: 4/3/96 at 14:38:10 From: "Rebecca J. White" Subject: math question Dear Dr. MATH, Is a circle a polygon? Why or why not? What is a 3-D shape that has 18 sides called? From Ryan, Amanda, and Danielle
Date: 4/3/96 at 16:56:49 From: Doctor Jodi Subject: Re: math question Hi Ryan, Amanda, and Danielle! Thanks for your questions. Since the Greek prefix for 18 is octakaideca (which means eight and ten), we could call a polyhedron with 18 sides an octakaidecahedron. Boy is that a name for a shape! Can you think of any ways to make one of those? What might you nickname an octakaidecahedron? As for calling a circle a polygon.. Boy this is a very interesting question! Well, as you add more and more sides to a polygon, it does start to look more and more like a circle. So some people, even some mathematicians, have called a circle an "infinite polygon"--that is, a polygon with infinitely many sides. Other people heartily disagree. I'm not sure what to think about the whole thing... What about you three? -Doctor Jodi, The Math Forum
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