| r1917 |
orthocenter,
ninecenter |
| r1918 |
incenter |
| r1919 |
pedal triangle |
| r1920 |
incenter,
incentric
triangle |
| r1925 |
pedal triangle |
| r1963 |
circumcenter,
orthocenter,
medial
triangle, pedal triangle, pedal
circle, Tixier point |
| r1964 |
antipedal
triangle |
| r1969 |
circumcenter |
| r1970 |
circumcenter |
| r1971 |
orthocenter,
circumcenter,
tripolar,
point
X(186), point X(275) |
| r1977 |
altitude
feet, centroid,
Gob
point |
| r1978 |
orthocenter,
circumcenter,
altitude
feet, point X(389) |
| r1981 |
|
| r1987 |
orthologic
triangles,
anticomplement |
| r1992 |
pedal triangle |
| r1995 |
orthocenter |
| r1997 |
orthocenter |
| r2000 |
|
| r2001 |
pedal triangle |
| r2002 |
incenter |
| r2003 |
incenter |
| r2012 |
orthocenter,
circumcenter,
isotomic
points |
| r2013 |
orthocenter |
| r2054 |
orthocenter,
altitudes,
Euler
line, homothetic triangles |
| r2056 |
altitude
feet, orthocenter,
Euler
line, circumcircle,
ninecircle |
