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1989 IMO Problems/Problem 4: Revision history

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30 January 2021

30 August 2008

  • curprev 14:2814:28, 30 August 2008 Cosinator talk contribs 4,085 bytes +4,085 New page: Let <math>ABCD</math> be a convex quadrilateral such that the sides <math>AB,AD,BC</math> satisfy <math>AB=AD+BC</math>. There exists a point <math>P</math> inside the quadrilateral at a d...
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