Similar to ナーゲル点

Clawson point

Cayley's formula

Kosnita's theorem

Kochanek–Bartels spline

Gossard perspector

Conway circle theorem

Conway triangle notation

Jerabek hyperbola

Steiner ellipse

Steiner point (triangle)

Spieker center

Spieker circle

Soddy circles of a triangle

Soddy line

Tarry point

Cevian

Catalogue of Triangle Cubics

Circumgon

Triangle center

Circumcircle

Congruent isoscelizers point

Equal parallelians point

Incircle and excircles

Orthocentroidal circle

De Longchamps point

Malfatti circles