Category:三角形に関する定理

Menelaus's theorem

Law of sines

Ceva's theorem

Law of cosines

Law of tangents

L'Huilier's theorem

Desargues's theorem

Apollonius's theorem

Exterior angle theorem

Law of cotangents

Bottema's theorem

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)

Feuerbach hyperbola

Angle bisector theorem

Napoleon's theorem

Stewart's theorem

Midpoint theorem (triangle)

Heron's formula

Routh's theorem

Morley's trisector theorem