| r2038 | incentric triangle |
| r2052 | circumcenter, ninecenter, orthologic triangles, concyclic points |
| r2054 | altitudes, isogonal points, Euler line, homothetic triangles |
| r2056 | altitude feet, isogonal points, Euler line, circumcircle, ninecircle |
|
|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 |