which angles are complementary to each other?

Answer:
Angles 2 and 1
Step-by-step explanation:
Complementary angles are angles that sum to 90° or form a right angle. In this case, the right angles are 3 and 4, but the two angles that FORM a right angle are angles 2 and 1.
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Answer:
Explanation:
The only angle that forms a complementary angle pair is ∠2 and ∠1 because both angles form a right angle.
Hence, ∠1 and ∠2 are complementary angles.