Question

find ( mangle bfc ).
one way to get started is with a vertical angle relationship. what is ( mangle afb )?
( mangle afb=)

Explanation:

Step1: Recall vertical angle relationship

Vertical angles are equal. $\angle AFB$ and $\angle EFD$ are vertical angles.

Step2: Determine the measure of $\angle AFB$

Since $\angle EFD = 28^{\circ}$, then $m\angle AFB=m\angle EFD$.

Answer:

$28$