Answer:
(a) 180°
(b) 180°
(c) 180° + 180° = 360
Explanation:
If you add (angle a) and (angle b), we can see it forms a straight line across, which we can tell is a 180° angle.
Since these are verticle angles, and same is going to be for the 2nd question.
If you add both these angles, you would get 360°
180° + 180° = 360°