Answer:
The answer is 60 degrees because the circle consists of a vertical angle. So no matter how much you move a line, the other side of the angle will always match.
More explanation:
Vertical angles are a pair of opposite angles formed by intersecting lines. In the figure, ∠1 and ∠3 are vertical angles. Vertical angles are always congruent . So, in this figure, ∠1≅∠3 and ∠2≅∠4 .
Have the best day ever! :D