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X(2), X(7), X(369), X(370) and its five mates (blue points) A', B', C' : midpoints of ABC Ga, Gb, Gc : vertices of the antimedial triangle isotomic conjugates of X(616), X(617) extraversions of X(7) 

Q100 is the locus of M such that the Euler line of the cevian triangle of M passes through the circumcenter O of ABC (Nikolaos Dergiades, ADGEOM #909). It has the remarkable property to contain X(369) and X(370). See Table 10 and Table 42. 
