Category:三角形に関する定理

Stewart's theorem

Midpoint theorem (triangle)

Law of cotangents

Law of sines

Angle bisector theorem

Bottema's theorem

Pappus's area theorem

Exterior angle theorem

Droz-Farny line theorem

Thomsen's theorem

Carnot's theorem (conics)

Carnot's theorem (perpendiculars)

Maxwell's theorem (geometry)

Jacobi's theorem (geometry)

Apollonius's theorem

Feuerbach hyperbola

Routh's theorem

Napoleon's theorem

Law of tangents

Menelaus's theorem

Desargues's theorem

Ceva's theorem

Law of cosines

Heron's formula

Morley's trisector theorem