Question

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

Explanation:

Step1: Recall vertical angle property

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

Step2: Identify the measure of $\angle EFD$

Given that $m\angle EFD = 28^{\circ}$.
Since $\angle AFB$ and $\angle EFD$ are vertical angles, $m\angle AFB=m\angle EFD$.

Answer:

$28$