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Math Forum » Discussions » Math Topics » geometry.pre-college.independent

Topic: Classification of quadrilaterals
Replies: 17   Last Post: Jan 11, 1995 6:43 AM

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joe malkevitch

Posts: 62
Registered: 12/3/04
Classfying quadrilaterals
Posted: Jan 11, 1995 6:43 AM
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I have not completely followed the discussions about quadrilaterals and their
symmetry so I apologize if I raise an issue that has already been noted.
In the early discussion I saw, the assumption was being made that
a quadrilateral was plane, convex. There are also interesting issues
that come up when one allows non-convex plane quadrilaterals and plane
but self-intersecting quadrilaterals. Furthermore, not all quadrilaterals
need be plane. There are new ideas and problems to be explored in these
cases.
-------
JOE MALKEVITCH DEPT. OF MATH. YORK COLLEGE (CUNY) JAMAICA, NY 11451
EMAIL: JOEYC@CUNYVM OR JOEYC@CUNYVM.CUNY.EDU PHONE: 718-262-2550 (2551)

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