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X(2), X(3), X(13), X(14), X(403), X(524), X(1157), X(1993), X(3563)

Geometric properties :

K938 is the isogonal transform of K441. It is the orthopivotal cubic O(X1993).

Its singular focus X(15560) is the Psi-transform of X(1993), also the inverse of X(14669) in the circumcircle.