| r1578 |
altitudes,
De
Longchamps point, point X(74) |
| r1622 |
cevian
triangle, retrocenter,
De
Longchamps point |
| r1624 |
cevian
triangle, retrocenter,
orthic
triangle |
| r1633 |
isogonal
points, pedal
triangle, pedal circle |
| r1670 |
cevian
triangle |
| r1678 |
cevian
triangle, circumcircle,
inverse
points |
| r1817 |
intouch
triangle, incircle,
incenter |
| r1841 |
perspective,
circumconic |
| r1912 |
parallelogic
triangles, ninecircle |
| r1923 |
ninecenter,
medial
triangle,
altitudes,
point
X(64) |
| r1926 |
circumcenter,
orthocenter,
tangential
triangle,
point
X(265) |
| r1953 |
ninecenter,
altitude
feet |
| r1954 |
ninecenter,
altitude
feet,
Euler line,
orthocenter,
circumcenter,
centroid |
| r1966 |
orthocenter,
altitude
feet |
| r1980 |
circumcenter,
homothetic
triangles |
| r1986 |
|
| r1987 |
isogonal
points,
anticomplement |
| r1998 |
circumcenter,
ninecircle,
Kosnita
point, point X(52) |
| r2014 |
incenter,
orthocenter,
point
X(84) |
| r2018 |
circumcenter,
centroid,
altitude
feet, perspective,
Euler
line |
| r2032 |
excenters,
incenter |
| r2033 |
circumcenter,
incenter,
excentral
triangle, pedal triangle, Euler
line, Feuerbach hyperbola |
| r2037 |
orthocenter,
incentric
triangle |
| r2040 |
incenter,
circumconic,
incentric
triangle, antipedal triangle,
Spieker
point |
| r2048 |
circumcenter,
ninecenter |
