If ∠1 and ∠4 are the complementary angles, then m∠1 + m∠4 =90°.
We have m∠1 = 33°.
Therefore
m∠4 = 90° - 33° = 57°
If ∠3 and ∠2 are supplementary angles, then m∠2 + m∠3 = 180°.
We have m∠2 = 147°.
m∠3 = 180° - 147° = 33°
