Question

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

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 the given angles

In the figure, ∠DEC and ∠DEH form a straight - line at point E. So, ∠DEC+∠DEH = 180°.

Answer:

∠DEC and ∠DEH