Name a pair of complementary angles (there may be more than one pair). <1 and <5
<1 and 2
<2 and <4
<3 and <4
<5 and <4

  ∠3 and ∠4

Step-by-step explanation:

In this diagram, angles 3 and 4 are the only pair whose sum is 90°.

In this given figure, and are the only pairs of angles that have the measure of 90°.

So, & are the pair of angles.

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