A vector is a mathematical concept that denotes direction and magnitude. They're often notated using an arrow ($\overrightarrow{v}$), or with a bold, lowercase letter. (**v**).




$$\begin{bmatrix}
1 \\
2
\end{bmatrix}
$$

# Magnitude
The magnitude of a vector is $|\overrightarrow{v}| = \sqrt{a^2 + b^2}$
# Direction
The direction of a vector is $\theta = \tan^-1