Vertical angles share the same vertex. Therefore, the angle that is vertically opposite to the angle ∠EFD is the angle ∠AFB
What are vertical angles?
Vertical angles are angles that share the same vertex. Vertical angles are a pair of opposite angles formed by intersecting lines.
Vertical angles are congruent.
Therefore, the angle that is vertical to ∠EFD is as follows:
since, vertical angles are congruent
∠EFD ≅ ∠AFB
Therefore, the angle ∠AFB and ∠EFD are vertical angles because they share the same vertex.
learn more on vertical angles here: https://brainly.com/question/26664800
