Triangle Inequality Theorems and Parts of a Triangle
A diagram illustrating triangle inequality theorems, including Ss-Aa and Aa-Ss, with the triangle inequality formula S₁ + S₂ > S₃, S₁ + S₃ > S₂, and S₂ + S₃ > S₁. It also shows parts of a triangle ABC with sides and their opposite angles, and inequalities in one triangle.