| r1411 |
Thebault
circles, incircle |
| r1412 |
Thebault
circles, circumcenter,
concyclic
points |
| r1413 |
Thebault
circles, circumcenter,
tangent
circles |
| r1434 |
Feuerbach
point, point X(100), centroid,
circumcenter |
| r1468 |
orthocenter,
circumcenter,
altitudes |
| r1495 |
incenter,
orthocenter,
circumcenter |
| r1530 |
incenter,
orthocenter |
| r1538 |
Spieker
circle,
medial triangle |
| r1597 |
isogonal
points, orthocenter,
circumcenter,
circumcevian
triangle, tangential
triangle |
| r1644 |
incenter,
intouch
triangle, incircle |
| r1646 |
Feuerbach
point, Mittenpunkt,
cevian
circle |
| r1758 |
|
| r2022 |
incenter,
ninecircle |
