Talk:Quadrilateral

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Umm...Aren't cyclic quadrilaterals (in their full glory) an intermediate and olmypiad topic?--IntrepidMath 22:32, 19 June 2006 (EDT)

I think introductory students can learn a bit about cyclic quadrilaterals -- things like the fact that the opposite angles add to 180 degrees.--MCrawford 22:58, 19 June 2006 (EDT)