Give an example of a finite incidence geometry with at most six points which does not satisfy Playfair's Postulate (that a line has exactly one parallel through each point not on that line).

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- March 2nd 2010, 08:35 AMrainyiceGive an example of a finite incidence geometry
Give an example of a finite incidence geometry with at most six points which does not satisfy Playfair's Postulate (that a line has exactly one parallel through each point not on that line).

- March 3rd 2010, 07:01 AMrainyice
can anyone help? I will have the test tomorrow, and I want to get the maximum understanding of this stuff ... thank you.