Category:三角形に関する定理

Menelaus's theorem

Ceva's theorem

Stewart's theorem

Exterior angle theorem

Bottema's theorem

Midpoint theorem (triangle)

Apollonius's theorem

Pappus's area theorem

Routh's theorem

Thomsen's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Law of tangents

Droz-Farny line theorem

Feuerbach hyperbola

Desargues's theorem

Angle bisector theorem

Morley's trisector theorem

Law of cotangents

Napoleon's theorem

Law of sines

Law of cosines

Heron's formula