r2050

Let P be a point, A'B'C' its antipedal triangle, r a line through P. Let A, B, C be the orthogonal projections of the vertices on r. Let A*, B*, C* be the midpoints of AA, BB, CC and Ma, Mb, Mc the midpoints of A'A*, B'B*, C'C*. The triangles ABC, MaMbMc are orthologic.


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