perplexus.info :: Shapes : 5 points to convex quad

5 points to convex quad (Posted on 2009-10-05)

Given 5 coplanar points with no three collinear, prove that there must be a subset of 4 points that form a convex quadrilateral.

See The Solution Submitted by Jer

Rating: 4.0000 (1 votes)

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Subject	Author	Date
re: another proof	Charlie	2009-10-07 12:06:19
re: another proof (tiny problem)	Jer	2009-10-06 17:52:27
another proof	Charlie	2009-10-06 11:22:51
Solution	Bractals	2009-10-05 16:25:50

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