Use the Dot Product to Find $|\mathbf{v}|$ - $$\mathbf { v } = \langle - 2 , - 1 \rangle$$

Multiple Choice

Use the dot product to find $|\mathbf{v}|$
- $$\mathbf { v } = \langle - 2 , - 1 \rangle$$

A) $- 3$
B) $\sqrt { 3 }$
C) $- 1$
D) $\sqrt { 5 }$