CZ-SK-MO 1998 Problem 5
A circle and a point outside it are given in the plane. Prove that all trapezoids, whose non-parallel sides meet at , have the same intersection of diagonals.
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
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