r1609	incenter, circumcenter, centroid, incircle
r1633	isogonal points, orthologic triangles, pedal circle
r1642	isogonal points, circumcenter, homothetic triangles
r1728	centroid, orthocenter, De Longchamps point, Brocard line
r1740	orthic triangle, perspective, orthocenter, Gergonne point
r1767	circumcenter, ninecenter, Jerabek hyperbola, perspective
r1768	isogonal points, perspective
r1806	isogonal points, circumcevian triangle, perspective
r1811	medial triangle, side triangle, perspective, ninecircle, pedal circle
r1843	circumcevian triangle
r1844	circumcevian triangle
r1907	incenter, ninecenter, Euler line, incentric triangle, isogonal points
r1919	isogonal points
r1925	isogonal points
r1931	circumcevian triangle, isogonal of the infinite point
r1963	circumcenter, orthocenter, isogonal points, medial triangle, pedal circle, Tixier point
r1992	isogonal points
r2001	isogonal points
r2007	centroid
r2026
r2033	circumcenter, incenter, excentral triangle, orthologic triangles, Euler line, Feuerbach hyperbola

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