Answer
150$^{\circ}$
Work Step by Step
I=$\frac{(12-2)\times180}{12}$
I=$\frac{(10)\times180}{12}$
I=150
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.