3.

4. Cross- multiply
8.

9.

10.

11. Line Segment Additive Property
PERRTAAAAAAAAAAYYYYYYYYYYYYYY
Answer:
JUSTIFICATION↓
∠1 ≅ ∠2 <u>(∵ Vertically-opposite angles are equal)</u>
Step-by-step explanation:
Since ∠1 lies vertically opposite to ∠2 and vice -versa , therefore ∠1 and ∠2 are equal to each other