Similar to メネラウスの定理

Apéry's theorem

Abel–Plana formula

Apollonian gasket

Erlang distribution

Archimedes's cattle problem

Twin circles

Algorithm

Artin L-function

Artin–Hasse exponential

Wedderburn–Artin theorem

Artinian module

Artinian ring

Artin–Schreier theory

Artin reciprocity

Artin–Rees lemma

Sieve of Eratosthenes

Euler line

Euler's theorem in geometry

Cavalieri's principle

Carnot's theorem (conics)

Carnot's theorem (inradius, circumradius)

Carnot's theorem (perpendiculars)

Cayley–Hamilton theorem

Simson line

Steiner ellipse