Triangle Inequality/Complex Numbers/Examples/3 Arguments/Proof 1

Proof
This is an instance of the General Triangle Inequality for Complex Numbers:


 * $\cmod {z_1 + z_2 + \dotsb + z_n} \le \cmod {z_1} + \cmod {z_2} + \dotsb + \cmod {z_n}$

setting $n = 3$.