Similar to スチュワートの定理

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

Albanese variety

Alexander polynomial

List of things named after Alexander Grothendieck

Alexandrov theorem

Anscombe's quartet

Euler line

Euler's theorem in geometry

Cavalieri's principle

Carnot's theorem (conics)

Carnot's theorem (inradius, circumradius)

Carnot's theorem (perpendiculars)

Simson line

Steiner ellipse