Triangle Theorems

Isosceles Triangle Theorem, by Porter Blackman and Patrick Sweeney

The Opposite Parts Theorem, by Porter Blackman and Patrick Sweeney

The Exterior Angle Theorem, by Ian Prevas and Tom Ryan

The Triangle Inequality, by Ian Prevas and Tom Ryan

The Hinge Theorem, by Porter Blackman and Patrick Sweeney

The converse of the Hinge Theorem, by Ian Prevas and Tom Ryan