| r2009 |
orthocenter,
circumcenter,
Euler
line,
excenters,
ninecircle |
| r2023 |
circumcenter,
incenter,
altitude
feet,
altitudes,
ninecircle,
point
X(52) |
| r2030 |
circumcenter,
centroid,
medians |
| r2048 |
circumcenter,
orthologic
triangles |
| r2052 |
orthocenter,
circumcenter,
orthologic
triangles, concyclic points |
| r2061 |
incenter |
| r2062 |
excenters |
| r2069 |
isogonal
points, concyclic points |
| r2076 |
circumcenter,
cevian
triangle |
| r2078 |
circumcenter,
cevian
triangle, circumconic |
