| r1591 |
Feuerbach
point |
| r1599 |
Brocard
line |
| r1603 |
circumcenter,
ninecenter |
| r1615 |
isogonal
points, Beltrami points |
| r1620 |
altitude
feet, point X(125) |
| r1659 |
altitudes,
circumcircle,
circumcenter |
| r1662 |
centroid,
orthocenter,
altitudes,
excenters |
| r1663 |
intouch
triangle, medial triangle |
| r1664 |
intouch
triangle, Euler line, orthic
triangle |
| r1665 |
intouch
triangle |
| r1671 |
orthocenter,
altitude
feet,
circumcevian
triangle |
| r1672 |
orthocenter,
altitude
feet, circumcevian triangle,
point
X(186) |
| r1673 |
orthocenter,
altitude
feet |
| r1684 |
centroid,
orthocenter,
cevian
circle, altitudes |
| r1692 |
point X(265) |
| r1703 |
orthocenter,
circumcenter,
circumcevian
triangle,
homothetic triangles |
| r1706 |
orthocenter,
circumcenter,
circumcevian
triangle,
homothetic triangles |
| r1707 |
orthocenter,
circumcenter,
circumcevian
triangle,
homothetic triangles |
| r1721 |
perspective,
Jerabek
hyperbola, similar triangles |
| r1727 |
ninecircle,
pedal
circle, point X(125) |
| r1742 |
circumcircle,
altitudes,
circumcenter |
| r1744 |
MacBeath
ellipse, tangential triangle,
concyclic
points |
| r1746 |
Jerabek
hyperbola |
| r1771 |
circumcenter |
| r1777 |
circumcircle |
