Category:三角形に関する定理

Heron's formula

Menelaus's theorem

Ceva's theorem

Law of cosines

Midpoint theorem (triangle)

Stewart's theorem

Law of tangents

Angle bisector theorem

Exterior angle theorem

Desargues's theorem

Napoleon's theorem

Law of sines

Morley's trisector theorem

Law of cotangents

Bottema's theorem

Feuerbach hyperbola

Pappus's area theorem

Droz-Farny line theorem

Thomsen's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

L'Huilier's theorem

Apollonius's theorem

Routh's theorem