Similar to ブロカール点

Euler line

Carnot's theorem (conics)

Kiepert conics

Conway circle theorem

Conway triangle notation

Schiffler point

Steiner ellipse

Spieker circle

Soddy circles of a triangle

Soddy line

Thales's theorem

Cevian

1 + 1 + 1 + 1 + ⋯

1/2 + 1/4 + 1/8 + 1/16 + ⋯

1/2 − 1/4 + 1/8 − 1/16 + ⋯

1/4 + 1/16 + 1/64 + 1/256 + ⋯

Hundredth

Catalogue of Triangle Cubics

Circumgon

Encyclopedia of Triangle Centers

Circles of Apollonius

Golden triangle (mathematics)

Orthocentroidal circle

Medial triangle