Question

which angles are vertical angles? ∠feh and ∠deh ∠ghj and ∠fec ∠ghe and ∠ihj ∠ghj and ∠ghe

Explanation:

Step1: Recall vertical - angle definition

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

Step2: Analyze each option

• $\angle FEH$ and $\angle DEH$ are adjacent angles, not vertical angles.
• $\angle GHJ$ and $\angle FEC$ are not formed by the intersection of the same two - line pairs.
• $\angle GHE$ and $\angle IHJ$ are vertical angles because they are formed by the intersection of lines $GI$ and $JC$ and are opposite each other.
• $\angle GHJ$ and $\angle GHE$ are adjacent angles, not vertical angles.

Answer:

$\angle GHE$ and $\angle IHJ$