Top 21 Triangle Inequality Theorem Proof Photos. Learn to proof the theorem and get solved examples based on triangle the triangle inequality theorem describes the relationship between the three sides of a triangle. It is not possible to construct a triangle from three line segments if any of them is longer.
In a triangle, the length of any side is less than the sum of the other two sides.
Now, here is the triangle inequality theorem proof. We will use this theorem again in a proof at the end of this section. $\cmod {z_1 + z_2} \le \cmod {z_1} + \cmod {z_2}$. Determine if the triangle is possible:
