r204	duality, incircle, ninecircle, Steiner inellipse, complement
r230	third Brocard point, Spieker point, Mittenpunkt, point X(75)
r446	circumcircle, circumconic, point X(100), Mittenpunkt
r624	perspector, Yff parabola
r721	cevian quotient, point X(100), Steiner point
r1120	Steiner circumellipse
r1124	point X(671), Tarry point, Spieker point, Euler line
r1171	centroid, circumconic, complement, Gergonne point
r1691	circumcircle, point X(100), Steiner circumellipse
r1759