ISL 2020 G7
Let be a point on the circumcircle of an acute-angled triangle . Let , , and be the reflections of in the midlines of triangle parallel to , and , respectively. Denote by , and the circumcircles of triangles , and , respectively. Denote by the circumcircle of the triangle formed by the perpendicular bisectors of segments and . Show that , and have a common point. (Denmark)
Dataset text NuminaMath olympiads. Quoted with source.
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