Category:三角形に関する定理

Law of cosines

Law of sines

Ceva's theorem

Bottema's theorem

Feuerbach hyperbola

Pappus's area theorem

Thomsen's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Napoleon's theorem

Routh's theorem

Law of cotangents

Desargues's theorem

Droz-Farny line theorem

Apollonius's theorem

Exterior angle theorem

Stewart's theorem

Law of tangents

Angle bisector theorem

Morley's trisector theorem

Midpoint theorem (triangle)

Menelaus's theorem

Heron's formula