Which of the following angles in standard position is an acute angle?

In the context of angles in standard position, if point C is at $(0,0)$, point O is at $(1,0)$, and point A is at $(0,1)$, what is the measure of angle COA in degrees?

In the context of angles in standard position, which of the following pairs of angles are considered vertical angles?

If angle $CBD$ has a measure of $140°$, what is the measure of angle $ABD$ if point $A$ lies on the terminal side of angle $CBD$ such that $A$, $B$, and $D$ are collinear and $B$ is the vertex?

If angle $b$ measures $25°$, in which quadrant does its terminal side lie?

Given an angle in standard position with its initial side along the positive $x$-axis and its terminal side passing through point $S$ on the unit circle, if the arc $QS$ subtends an angle of $120°$ at the origin, what is the measure of arc $QS$ in radians?

Given two vectors $\overrightarrow{a}$ and $\overrightarrow{b}$ in standard position, what is the angle $\Theta$ between them?

At 7:00, what is the angular position in radians of the minute hand of a clock in standard position, measured from the positive $x$-axis (3 o'clock position) counterclockwise?

If $m\angle \mathrm{SQR}$ and $m\angle \mathrm{QRS}$ are two angles in standard position, which angle has a measure equal to the sum of $m\angle \mathrm{SQR}$ and $m\angle \mathrm{QRS}$?