Question

Solve for x in the circle below. Show your work, equations, and mark your answer.

Answer 1

x = -8

Explanation:

The sum of arcs of a semicircle is 180°. That means the arc whose measure is -11x+12 has a measure of 180° -80° = 100°.

-11x +12 = 100

-11x = 88 . . . . . . subtract 12

x = -8 . . . . . . . divide by -11