Category:証明を含む記事

Ptolemy's theorem

Stewart's theorem

Angle bisector theorem

Bézout's identity

Interesting number paradox

Law of cotangents

Casey's theorem

Lexell's theorem

Diagonal lemma

Kempner series

Helly's theorem

Primitive Pythagorean triple

Pappus's area theorem

Seven circles theorem

Taylor circle

Newton's theorem (quadrilateral)

Sz.-Nagy's dilation theorem

Open mapping theorem (complex analysis)

Gauss's lemma (number theory)

Carathéodory's theorem (convex hull)

Mean value theorem (divided differences)

Hardy–Littlewood inequality

Apollonius's theorem

Five lemma

Petr–Douglas–Neumann theorem

Napkin ring problem

Apollonius point