Question

look at this diagram: if ce and fh are parallel lines and m∠cdg = 60°, what is m∠edb?

Explanation:

Step1: Identify vertical - angle relationship

$\angle CDG$ and $\angle EDB$ are vertical angles.

Step2: Apply vertical - angle property

Vertical angles are congruent. Since $m\angle CDG = 60^{\circ}$, then $m\angle EDB=m\angle CDG$.

Answer:

$60^{\circ}$