Category:三角形に関する定理

Law of cosines

Law of sines

Bottema's theorem

Feuerbach hyperbola

Pappus's area theorem

Thomsen's theorem

Exterior angle theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Routh's theorem

Ceva's theorem

Law of cotangents

Desargues's theorem

Droz-Farny line theorem

Apollonius's theorem

Napoleon's theorem

Stewart's theorem

Angle bisector theorem

Morley's trisector theorem

Law of tangents

Midpoint theorem (triangle)

Menelaus's theorem

Heron's formula