r138	point X(110), circumcenter
r202	symmedian point, Fermat axis, point X(265)
r328	isogonal points, cevian triangle, pedal triangle, similar triangles
r427	incenter, excenters, concyclic points
r507	circumcircle, point X(115), point X(110), Parry point, Parry circle, concyclic points
r949	antigonal points, Lester circle
r983	circlecevian triangle, orthocenter, circumcenter
r1394	tangential triangle
r1584	centroid, Euler line, point X(110)
r1715	orthic triangle, Parry reflection point