r140	incenter, ninecenter, Feuerbach point, harmonic points
r142	Gergonne point, circumcenter, Feuerbach point, incenter, orthocenter, centroid, Schiffler point, point X(56)
r144	Gergonne point, circumcenter, incenter, symmedian point, Clawson point, Nagel point, Spieker point, point X(65)
r205	excircles, ninecircle
r366	ninecenter, Feuerbach point, desmic structure
r374	ninecenter, perspective, anticevian triangle, cevian quotient
r548	intouch triangle, medial triangle, incircle, homothetic triangles
r1096	point X(442), Euler line, Spieker point
r1284	Feuerbach point, Steiner line
r2045	excircles, tangent circles