r1146 |
Exeter
point, De Longchamps line |
r1153 |
incircle,
Brocard
circle, point X(647), radical center |
r1181 |
altitude
feet,
circumcenter,
ninecircle,
tangent
circles |
r1259 |
perspective |
r1260 |
perspective,
altitude
feet, orthic triangle, homothetic
triangles |
r1265 |
homothetic triangles, tangent
circles |
r1266 |
symmedian
point, Brocard line, tangent circles |
r1278 |
isogonal
points, circumcenter |
c51 |
perspective,
orthologic
triangles |
c56 |
circumconic |
r1302 |
isogonal
lines, Brocard line |
r1314 |
circumconic,
perspector,
point
X(184) |
r1325 |
incenter,
perspective,
point
X(65) |
r1326 |
incenter,
incircle |
r1327 |
incenter,
point
X(56) |
r1328 |
point X(74) |
r1329 |
point X(110) |
r1330 |
point X(74),
perspective |
r1336 |
poristic
triangles,
MacBeath
conic, centroid,
orthocenter,
circumcenter |
r1339 |
circumcenter,
cevian
triangle, antimedial triangle, homothetic
triangles |
r1348 |
pedal triangle,
areal
center, Simson line, similar triangles |
r1363 |
incentric
triangle |
r1382 |
Steiner
deltoid, ninecenter |
r1389 |
orthopole,
retrocenter |