r94	Kiepert hyperbola
r101	symmedian point, centroid, circumcenter, Tarry point, Steiner point
r688	perspective, centroid, homothetic triangles
r1112	circumcircle, Brocard line, Tarry point, Steiner point
r1116	centroid, symmedian point, isogonal points, isotomic points, Steiner circumellipse
r1364	centroid, Fermat points, isodynamic points, symmedian point, Parry point