Answer: the angles are if the 30° is in the first quadrant:
30°, 150°, 30°, 150° (from quadrant one to quadrant four)
Explanation:
If two lines intersect, and one of the angles that form is 30°, we have that:
Now, suppose that you have only a line, this is the representation of a 180° angle, then if you divide it with a line and one of the angles created is 30°, the other angle must be equal to 150°
and on the other side of the line we will have a mirrored image, right next to the 150° we should see another 30° angle, and after that another 150° angle.