Question

Which pair of angles must be supplementary?

Answer 1

The  pair of angles must be supplementary are ∠1+∠2+∠3, ∠3+∠4,∠4+∠5 and ∠1+∠2+∠5.

What is supplementary angle?

Two angles are called supplementary when their measures add up to 180 degrees.

∠1+∠2+∠5=180 (linear pair)

and, ∠4+∠5=180

also, ∠3+∠4=180

∠1+∠2+∠3=180

Learn more about supplementary angle here:

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Answer 2

Answer:

<4 and <5

Step-by-step explanation:

theyre both along the same line and are the only 2 on that side so they will add to 180 degrees. supplementary angles add to 180.

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