1. Given: Note that on the top, it is shown right next to "given"
2. Vertical angles theorem: Angles vertically opposite of each other are congruent
3. Transitive Property: If ∠3 ≅ ∠2 (Given), and ∠2 ≅ ∠6, then ∠3 ≅ ∠6
hope this helps
