Question

which angles are supplementary angles? ∠ihj and ∠feh ∠ihj and ∠ghe ∠ihj and ∠ihe ∠ihj and ∠dec

Explanation:

Step1: Recall supplementary - angle definition

Two angles are supplementary if their sum is 180 degrees. Adjacent angles that form a straight - line are supplementary.

Step2: Analyze each option

• For $\angle IHJ$ and $\angle FEH$, they are not adjacent and do not form a straight - line.
• For $\angle IHJ$ and $\angle GHE$, they are not adjacent and do not form a straight - line.
• For $\angle IHJ$ and $\angle IHE$, $\angle IHJ+\angle IHE = 180^{\circ}$ since they form a straight - line $CJ$.
• For $\angle IHJ$ and $\angle DEC$, they are not adjacent and do not form a straight - line.

Answer:

$\angle IHJ$ and $\angle IHE$