26 August 2025

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27 July 2024

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26 July 2024

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• curprev 15:2415:24, 26 July 2024 Irakli400 talk contribs 5,591 bytes +2,503 →Solution
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18 November 2023

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23 March 2015

• curprev 15:4815:48, 23 March 2015 Sigmundur talk contribs 323 bytes +323 Created page with "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 perpendicul..."