X(2), X(4), X(6), X(39), X(256), X(291), X(511), X(694), X(1432), X(1916), X(3978), X(4876), X(6660), X(7779)
Infinite points of the Steiner ellipses
K354 = pK(X694, X1916) is the isogonal transform of K252. See also CL041 and K353. K354 is a member of the class CL043 : it meets the circumcircle at A, B, C and three other points where the tangents are concurrent.
Its pole X(694) and pivot X(1916) are respectively the isogonal and isotomic conjugates of X(385), the G-Hirst inverse of K.
The third point on the Euler line is X(6660) and the third point on the line GK is X(7779).
The tangents at A, B, C are the symmedians.