| r315 |
perspective |
| r551 |
orthocenter,
circumcenter,
symmedian
point,
Nagel point,
tangential
triangle |
| r739 |
incenter,
excentral
triangle, orthocenter, circumcenter,
Bevan
point, Mittenpunkt,
Prasolov
point,point X(84) |
| r1264 |
orthologic
triangles, altitudes |
| r1807 |
circumcircle,
altitudes,
ninecenter,
complement,
concyclic
points |
| r1923 |
ninecenter,
medial
triangle,
altitudes,
orthologic
triangles |
| r2066 |
circumcenter,
perspective,
point
X(155) |
| r2067 |
|
