Art of Problem Solving

1998 IMO Problems/Problem 1: Difference between revisions

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==See Also==
==See Also==


{{IMO box|year=1998|before=First Question|num-a=2}}
{{IMO box|year=1998|before=First Question|after=Last Question}}

Revision as of 22:51, 18 November 2023

Problem

In the convex quadrilateral ABCD, the diagonals AC and BD are perpendicular and the opposite sides AB and DC are not parallel. Suppose that the point P , where the perpendicular bisectors of AB and DC meet, is inside ABCD. Prove that ABCD is a cyclic quadrilateral if and only if the triangles ABP and CDP have equal areas.

Solution

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See Also

1998 IMO (Problems) • Resources
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First Question
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Last Question
All IMO Problems and Solutions