Question

which angles are supplementary to each other? ∠16 and ∠15 ∠8 and ∠16 ∠11 and ∠7 ∠13 and ∠3

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 ∠16 and ∠15: They are adjacent and form a straight - line, so ∠16+∠15 = 180 degrees.
• For ∠8 and ∠16: They are not adjacent and do not form a straight - line. There is no information to suggest their sum is 180 degrees.
• For ∠11 and ∠7: They are not adjacent and do not form a straight - line. There is no information to suggest their sum is 180 degrees.
• For ∠13 and ∠3: They are not adjacent and do not form a straight - line. There is no information to suggest their sum is 180 degrees.

Answer:

∠16 and ∠15