Category:証明を含む記事

De Moivre's formula

Law of sines

Angle bisector theorem

Interesting number paradox

Thales's theorem

Primitive Pythagorean triple

Ptolemy's theorem

Laplace expansion

Proof that 22/7 exceeds π

Law of cotangents

Sylvester–Gallai theorem

Stewart's theorem

Noisy-channel coding theorem

Tangent half-angle substitution

Proof that π is irrational

Five lemma

Feuerbach's theorem

Cauchy's mean value theorem

Helly's theorem

Casey's theorem

Pappus's area theorem

Taylor circle

Napkin ring problem

Seven circles theorem

Leibniz formula for determinants

Diagonal lemma

Newton's theorem (quadrilateral)