r41	Vecten points, isodynamic points, Fermat points, centroid, orthocenter, circumcenter, Brocard line, De Longchamps point, autopolar triangle, symmedian point
r339	centroid
r494	Vecten squares, antipedal triangle, centroid, homothetic triangles
r729	centroid, antipedal triangle
r730	Steiner point, retrocenter, point X(74)
r1638	circumcevian triangle, perspective, centroid, circumcenter