r2033	incenter, excentral triangle, pedal triangle, orthologic triangles, Euler line, Feuerbach hyperbola
r2048	ninecenter, orthologic triangles
r2051	tangential triangle
r2052	orthocenter, ninecenter, orthologic triangles, concyclic points
r2058	incenter
r2066	perspective, point X(64), point X(155)
r2075	cevian triangle, homothetic triangles
r2076	cevian triangle, ninecenter
r2077	Euler line
r2078	cevian triangle, ninecenter, circumconic

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