## Precalculus (6th Edition) Blitzer

From the given figure, the lengths of the vectors $\mathbf{A}$ and $\mathbf{C}$ are the same, which means that the magnitudes of the vectors $\mathbf{A}$ and $\mathbf{C}$ are the same. $\left\| \mathbf{A} \right\|=\left\| \mathbf{C} \right\|$ Thus, the statement is true.