Answer:
if m∠1 = 30° then m∠3 = 30° as they are parallel to each other and that is why they will have same angles.
therefore m∠3 = 30°
extra's:
→ m∠2 = m∠4 =
→ (360-30*20)/2
→ 150°
...............................
See here
m<1 and m<3 are opposite angles to eachother.
And we know that opposite angles are equal
so
