Category:三角形に関する定理

Bottema's theorem

Pappus's area theorem

Thomsen's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Stewart's theorem

Morley's trisector theorem

Apollonius's theorem

Routh's theorem

Feuerbach hyperbola

Droz-Farny line theorem

Napoleon's theorem

Law of cotangents

Exterior angle theorem

Midpoint theorem (triangle)

Desargues's theorem

Angle bisector theorem

Law of tangents

Menelaus's theorem

Ceva's theorem

Law of cosines

Law of sines

Heron's formula