1. Measuring Angles

Given a point $(3,4)$ on the terminal side of an angle $\angle$ in standard position, what is the measure of angle $ACB$ in degrees?

Given two intersecting lines in the coordinate plane, which diagram shows angles $1$ and $2$ as vertical angles in standard position?

If an angle $\theta$ is in standard position and $\theta =85°$, in which quadrant does its terminal side lie?

If angle $DEF$ measures $75°$, what is the measure of angle $CFD$ if $CFD$ and $DEF$ are supplementary angles in standard position?