Talk:Digon

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"Physically impossible"? Mathworld has an illustration of a digon, along with a very different definition: "The digon is the degenerate polygon (corresponding to a line segment) with Schläfli symbol { 2 } ." Also, Dr. Micah Fogel at the Illinois Mathematics and Science Academy defines digons (and monogons) as "two special curved polygons that have no analogs among polygons with straight edges." Clearly a straight-edged digon would be physically impossible -- but do polygons necessarily have to have straight edges? Could two points connected by two curved lines qualify as a digon? The University of Wisconsin Oshkosh has a website discussing, "the two-sided polygon called a lune," including illustrations on how to calculate the area of such two-sided polygons. I'm not a mathematician, but after just five minutes of google searches I've found at least three sources that seem to be at-odds with the wikipedia definition. Could someone more knowledgeable about geometry expand (and correct, if need be) this article? 66.17.118.207 16:54, 6 June 2006 (UTC)