X(91) = ISOGONAL CONJUGATE OF X(47)

Trilinears

\(sec 2A : sec 2B : sec 2C\)

\(cot A tan 2A : :\)

Barycentrics

\(sin A sec 2A : sin B sec 2B : sin C sec 2C\)

Notes

X(91) lies on these lines: 19,920 31,1087 37,498 47,92 63,921 65,68 225,847 255,1109 759,925

X(91) = isogonal conjugate of X(47)

X(91) = X(48)-cross conjugate of X(92)

X(91) = trilinear product of X(485) and X(486)

X(91) = polar conjugate of X(1748)

X(91) = X(92)-isoconjugate of X(563)

X(91) = trilinear pole of line X(661)X(2618)

X(91) = perspector of ABC and extraversion triangle of X(91) (which is also the anticevian triangle of X(91))

X(91) = trilinear product of vertices of outer and inner Vecten triangles