Answer:
∠ 3 and ∠ 2
Explanation:
Complementary angles sum to 90°
Since ∠ 1 = 90° and ∠ 1, ∠ 2 and ∠3 lie on a straight line, then
∠ 1 + ∠ 2 + ∠ 3 = 180°, that is
90° + ∠ 2 + ∠ 3 = 180° ( subtract 90° from both sides )
∠ 2 and ∠ 3 = 90°
Since they sum to 90° then
∠ 3 and ∠ 2 are complementary