r1401	point X(186), point X(74), Kosnita point
r1402	point X(186), point X(265), ninecenter
r1621	cevian triangle, retrocenter
r1639	ninecenter, Napoleon points
r1721	Euler line, perspective, similar triangles
r1746	Euler line
r1767	circumcenter, ninecenter, perspective, pedal triangle
r1773	circumcevian triangle
r1794	perspective, cevian triangle, side triangle, point X(647)
r1803	orthic triangle, parallelogic triangles
r1985	Euler line, ninecircle

 

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