∠6.
Options:
∠4 and ∠6 are vertical angles, so ∠4 is congruent to ∠6.
∠4 and ∠6 are alternate interior angles, so ∠4 is congruent to ∠6.
∠4 and ∠6 are alternate exterior angles, so ∠4 is congruent to ∠6.
∠4 and ∠8 are corresponding angles, and ∠6 and ∠8 are vertical angles, so ∠4 is congruent to ∠6.
∠4 and ∠8 are vertical angles, and ∠6 and ∠8 are corresponding angles, so ∠4 is congruent to ∠6.
PLEASE ANSWER THIS IM GIVING AWAY ALL MY POINTS