| r1619 |
altitude
feet |
| r1639 |
Jerabek
hyperbola, Napoleon points |
| r1701 |
orthocenter,
circumcenter,
orthic
triangle,
point X(403), homothetic triangles |
| r1705 |
orthocenter,
circumcenter,
orthic
triangle,
homothetic triangles |
| r1709 |
orthocenter,
circumcenter,
orthic
triangle |
| r1716 |
circumcenter,
orthic
triangle,
isogonal points, cevian
quotient |
| r1730 |
isogonal
points, circumconic,
medial
triangle |
| r1739 |
circumcenter,
perspector,
point
X(264), MacBeath
conic, ninecircle,
orthocentroidal
circle |
| r1749 |
De
Longchamps point, circumcenter,
altitude
feet |
| r1767 |
circumcenter,
Jerabek
hyperbola, perspective, pedal
triangle |
| r1774 |
circumcenter,
orthic
triangle |
| r1778 |
circumcenter,
altitude
feet, isogonal points, point
X(275) |
| r1807 |
circumcircle,
altitudes,
point
X(64),
complement,
concyclic points |
| r1848 |
orthocenter |
| r1852 |
ninecircle |
| r1862 |
altitudes,
point
X(265) |
| r1863 |
altitude
feet, point X(52) |
| r1864 |
circumcenter |
| r1865 |
perspective,
antimedial
triangle, orthic triangle,
Carnot
triangle, point X(110), point
X(52) |
| r1866 |
orthic
triangle,
altitudes,
circumcenter,
orthocenter,
similar
triangles |
| r1871 |
circumcenter,
perspective,
similar
triangles |
| r1875 |
incenter,
Euler
line, concyclic points |
| r1876 |
circumcenter,
complement,
antipedal
triangle |
| r1880 |
circumcenter,
orthocenter,
radical
center |
| r1890 |
altitudes,
orthic
triangle |
