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2018 IMO Problems/Problem 6: Revision history

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10 July 2018

  • curprev 23:4423:44, 10 July 2018 Btc433 talk contribs 289 bytes +289 Created page with "A convex quadrilateral <math>ABCD</math> satisfies <math>AB\cdot CD=BC \cdot DA.</math> Point <math>X</math> lies inside <math>ABCD</math> so that <math>\angle XAB = \angle XC..."
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