angle 4 is 108 because it is vertical to angle 2 so they are equal, angle 1 is 72 because it is a straight angle to angle 4 (or 2) which means when the angles are added together, they equal 180, and then angle 3 would also be 72 because it is also a straight angle with angle 4 (or 2) for the same reason (you could also say angle 3 is a vertical to angle 1 and that’s why they are equal)
