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Topic: Classifying quads visually
Replies: 2   Last Post: Nov 1, 2008 11:31 AM

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Joseph Malkevitch

Posts: 12
Registered: 6/22/06
Re: Classifying quads visually
Posted: Nov 1, 2008 11:31 AM
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Dear Colleagues,

Another interesting approach to classifying quadrilaterals appears in the paper by Branko Grünbaum:

The Angle-side Reciprocity of Quadrangles in Geombinatorics, Volume IV, 1995, pg. 115-118.

In his system Grünbaum finds 20 different kinds of plane,convex quadrilaterals, many of them not having names in other approaches.

Best wishes,

Joe

------------------------------------------------
Joseph Malkevitch
Department of Mathematics
York College (CUNY)
Jamaica, New York 11451

Note: My York phone has changed:

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