Question

look at this diagram: if $overleftrightarrow{bd}$ and $overleftrightarrow{eg}$ are parallel lines and $mangle bcf = 68^{circ}$, what is $mangle efh$?

Explanation:

Step1: Identify angle - relationship

$\angle BCF$ and $\angle EFH$ are vertical angles.

Step2: Apply vertical - angle property

Vertical angles are congruent. So $m\angle EFH=m\angle BCF$.

Answer:

$68$