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)

Feuerbach hyperbola

Apollonius's theorem

Routh's theorem

Droz-Farny line theorem

Stewart's theorem

Law of cotangents

Morley's trisector theorem

Exterior angle theorem

Napoleon's theorem

Desargues's theorem

Angle bisector theorem

Law of tangents

Midpoint theorem (triangle)

Menelaus's theorem

Ceva's theorem

Law of sines

Law of cosines

Heron's formula