Question

which angle is a vertical angle with ∠efd?
∠dfb
∠ced
∠bfc
∠afb

Explanation:

Step1: Recall vertical angle definition

Vertical angles are opposite angles formed by two intersecting lines.

Step2: Analyze each option

• \( \angle DFB \): Not opposite \( \angle EFD \).
• \( \angle CED \): Not formed by intersecting lines with \( \angle EFD \).
• \( \angle BFC \): Opposite \( \angle EFD \) (formed by intersecting lines \( EB \) and \( DC \)).
• \( \angle AFB \): Not opposite \( \angle EFD \).

Answer:

C. \( \angle BFC \)