Regular Polygon Maker
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If you increase the number of sides in a regular polygon, it soon starts to resemble a circle.
Contributed by: Conrad Wolfram (March 2011)
Open content licensed under CC BY-NC-SA
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Details
This Demonstration introduces the idea of limits. Would it be a circle if the number of sides were infinite?
A tooltip shows the area of the polygons, which approaches 
as the number of sides increases.
(This example was used in the author’s TEDGlobal 2010 talk "Stop Teaching Calculating, Start Teaching Math".)
Permanent Citation
"Regular Polygon Maker"
http://demonstrations.wolfram.com/RegularPolygonMaker/
Wolfram Demonstrations Project
Published: March 7 2011
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