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1969 IMO Problems/Problem 5

Revision as of 12:06, 20 October 2013 by Elvis (talk | contribs) (Created page with "Given n > 4 points in the plane such that no three are collinear. Prove that there are at least ³ n-3 ---- 2 ´ convex quadrilaterals whose vertices are four of the given points.")
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Given n > 4 points in the plane such that no three are collinear. Prove that there are at least ³ n-3 

 2

´ convex quadrilaterals whose vertices are four of the given points.

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