∠1 + 52° = 180° (Opposite angles are supplementary)
=> ∠1 = 180° - 52°
=> ∠1 = 128°
∠2 = 52° (Alternate interior angles)
∠3 = 47° (Alternate interior angles)
∠4 = 180° - ∠3 (Supplementary angles)
=> ∠4 = 180° - 47°
=> ∠4 = 133°
∠5 = 180° - (52° + 47°) (Supplementary angles)
=> ∠5 = 180° - 99°
=> ∠5 = 81°
