Question

which are vertical angles?
∠afe and ∠bfd
∠bfc and ∠dfe
∠afe and ∠cfd
∠bfc and ∠efa

Explanation:

Step1: Recall vertical - angles definition

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

Step2: Analyze each option

• For ∠AFE and ∠BFD: They are not vertical angles.
• For ∠BFC and ∠DFE: They are vertical angles as they are formed by the intersection of two lines and are opposite each other.
• For ∠AFE and ∠CFD: They are not vertical angles.
• For ∠BFC and ∠EFA: They are not vertical angles.

Answer:

∠BFC and ∠DFE