Category:三角形に関する定理

Heron's formula

Law of cosines

Menelaus's theorem

Ceva's theorem

Law of sines

Midpoint theorem (triangle)

Stewart's theorem

Law of tangents

Desargues's theorem

Napoleon's theorem

Angle bisector theorem

Exterior angle theorem

Morley's trisector 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

Apollonius's theorem

L'Huilier's theorem

Routh's theorem