Category:三角形に関する定理

L'Huilier's theorem

Law of tangents

Apollonius's theorem

Bottema's theorem

Pappus's area theorem

Droz-Farny line theorem

Thomsen's theorem

Exterior angle theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Feuerbach hyperbola

Ceva's theorem

Law of sines

Desargues's theorem

Menelaus's theorem

Angle bisector theorem

Law of cotangents

Midpoint theorem (triangle)

Stewart's theorem

Napoleon's theorem

Routh's theorem

Law of cosines

Morley's trisector theorem

Heron's formula