Question

which angles are vertical to each other? ∠bec and ∠dea ∠eag and ∠gah ∠gah and ∠dea ∠haf and ∠bec

Explanation:

Step1: Recall vertical - angles definition

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Analyze each option

For $\angle BEC$ and $\angle DEA$, they are formed by the intersection of lines $BD$ and $GC$, and they are opposite each other. So they are vertical angles.

Answer:

$\angle BEC$ and $\angle DEA$