Similar to 六円定理

Monge's theorem

Van Lamoen circle

Euler's theorem in geometry

Carnot's theorem (inradius, circumradius)

Polar circle (geometry)

Cramer–Castillon problem

Griffiths' theorem

Kosnita's theorem

Conway circle theorem

Simson line

Thébault's theorem

Reuschle's theorem

Incenter–excenter lemma

Japanese theorem for cyclic polygons

Harcourt's theorem

Lune of Hippocrates

Van Schooten's theorem

Fuhrmann circle

Pompeiu's theorem

Musselman's theorem

Miquel's theorem

Lester's theorem

(19308) 1996 TO66