r158	circumcircle, Exeter point, inverse points
r159	complement, far-out point, anticomplement, point X(468)
r160	Euler line, De Longchamps line
r1020	circumcevian triangle, centroid, orthocenter, circumcenter, point X(186)
r1092	Gob point, Parry point, point X(110), concyclic points
r1101	orthoassociate points, Gob point
r1680	centroid, orthocenter, cevian circle, medians
r1870	ninecircle, circumcircle, perspective, isogonal points