r58	tripolar centroid, symmedian point
r507	circumcircle, point X(115), point X(110), Parry point, Parry reflection point, concyclic points
r795	Brocard circle, circumcircle, Brocard line, radical center
r1747	Fermat points, isodynamic points, Parry reflection point, point X(110), centroid, concyclic points