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X(1), X(56), X(58), X(65), X(266), X(267), X(1046), X(2306), X(2307), X(8614), X(33654), X(71155), X(71156), X(71157), X(71158), X(71159)

isogonal conjugate of X(56313)

vertices of the cevian triangle of X(65)

vertices of the anticevian triangle of X(266)

Geometric properties :

K1428 is a member of the pencil of pKs with pole X(604) and pivot on the line {1,3} which contains K632, K1426, K1427.

K1428 is the isogonal transform of K1429, also its barycentric product by X(57).

K1428 is also the barycentric products X(1) x K134, X(7) x K1430, X(56) x K1431.