Question

which angles are vertical to each other? select all that apply. ∠6 and ∠8, ∠9 and ∠11, ∠1 and ∠3, ∠5 and ∠11

Explanation:

Step1: Recall vertical - angle definition

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Analyze each pair

• For ∠6 and ∠8: They are not vertical angles.
• For ∠9 and ∠11: They are not vertical angles.
• For ∠1 and ∠3: They are vertical angles as they are opposite each other where two lines intersect.
• For ∠5 and ∠11: They are not vertical angles.

Answer:

∠1 and ∠3