Category:三角形に関する定理

Heron's formula

Napoleon's theorem

Bottema's theorem

Law of cotangents

Pappus's area theorem

Droz-Farny line theorem

Thomsen's theorem

Apollonius's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Feuerbach hyperbola

Routh's theorem

Midpoint theorem (triangle)

Ceva's theorem

Exterior angle theorem

Law of tangents

Angle bisector theorem

Stewart's theorem

Law of sines

Desargues's theorem

Menelaus's theorem

Law of cosines

Morley's trisector theorem