Similar to タレスの定理

Arzelà–Ascoli theorem

Apollonius point

Five lemma

Apollonius's theorem

Euler's formula

Carathéodory's theorem (convex hull)

Geometric mean theorem

Kempner series

Cauchy's mean value theorem

Schiffler point

Sylvester–Gallai theorem

Stewart's theorem

Ceva's theorem

Thébault's theorem

Lune of Hippocrates

Feuerbach's theorem

Power of a point

Lexell's theorem

Annales de Gergonne

P-adic Teichmüller theory

P-adic distribution

RSA cryptosystem

Vieta jumping

Witch of Agnesi

Abelian group

Category of abelian groups

Abelian category