Answer
-123.186 degrees
Work Step by Step
We know that there are 180 degrees per $\pi$ radians. Thus, we find:
$$=-2.15 \times \frac{180^{\circ}}{\pi\ radians}=-123.186^{\circ}$$
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.