Question

which angles are congruent to each other? ∠12 and ∠8 ∠9 and ∠6 ∠14 and ∠16 ∠9 and ∠15

Explanation:

Step1: Recall vertical - angle property

Vertical angles are congruent. When two lines intersect, the opposite angles are equal.

Step2: Identify vertical - angle pairs

For the given set of intersecting lines, ∠14 and ∠16 are vertical angles.

Answer:

∠14 and ∠16