Question

which angles are adjacent angles? ∠ihe and ∠dec ∠ihj and ∠ghj ∠ghe and ∠feh ∠deh and ∠ihe

Explanation:

Step1: Recall adjacent - angle definition

Adjacent angles share a common vertex and a common side.

Step2: Analyze each option

• For $\angle IHE$ and $\angle DEC$, they do not share a common vertex or side.
• For $\angle IHJ$ and $\angle GHJ$, they share a common vertex $H$ and a common side $HJ$.
• For $\angle GHE$ and $\angle FEH$, they do not share a common vertex or side.
• For $\angle DEH$ and $\angle IHE$, they do not share a common vertex or side.

Answer:

$\angle IHJ$ and $\angle GHJ$