Jean-Pierre Ehrmann, Francisco Javier García Capitán, and Alexei Myakishev,
Construction of circles through intercepts of parallels to cevians,
Forum Geometricorum, 11 (2011) 261--268.
Abstract.
From the traces of the cevians of a point in
the plane of a given triangle, construct parallels to the cevians to
intersect the sidelines at six points. We determine the points for
which these six intersections are concyclic.
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