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Incircle, squares and equal areas

Source: 10.5 of XX Geometrical Olympiad in honour of I.F.Sharygin

August 7, 2024
geogeometry

Problem Statement

The incircle of a right-angled triangle ABCABC touches the hypothenuse ABAB at point TT. The squares ATMPATMP and BTNQBTNQ lie outside the triangle. Prove that the areas of triangles ABCABC and TPQTPQ are equal.