Answer:
Step-by-step explanation:
Since the 2 horizontal lines are parallel,
angle 1 and 3 are corresponding angles and hence equal
So, angle 1 = angle 3
20x + 60 = 30x + 20
10x = 40
x = 4
Now, finding angle 1
Angle 1 = 20x + 60
Angle 1 = 20 (4) + 60
Angle 1 = 140 degrees
Mark Brainliest if this answer helped
