Category:三角形に関する定理

Heron's formula

Midpoint theorem (triangle)

Napoleon's theorem

Menelaus's theorem

Desargues's theorem

Law of cotangents

Angle bisector theorem

Feuerbach hyperbola

Apollonius's theorem

Law of tangents

Bottema's theorem

Ceva'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)

Routh's theorem

Morley's trisector theorem

Droz-Farny line theorem

Stewart's theorem

Exterior angle theorem

Law of sines

Law of cosines