Answer
terminal; quadrant $I\!I\!I$
Work Step by Step
If angle $\theta$ is in standard position and the terminal side of $\theta$ lies in quadrant $X$, then we say $\theta$ lies in quadrant $X$ and we abbreviate it like this:
$$\theta \in QX$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.