Category:三角形に関する定理

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)

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

Angle bisector theorem

Desargues's theorem

Midpoint theorem (triangle)

Law of tangents

Menelaus's theorem

Ceva's theorem

Law of sines

Law of cosines

Heron's formula