Answer:
D
Step-by-step explanation:
d)∠3 + ∠ 4 +∠2 = 180
∠3 + ∠4 + (180 - ∠1) = 180 {from ∠1 + ∠2 = 180}
∠3 +∠4 = 180 -180 + ∠1
∠3 + ∠4 = ∠1
