Mathematics for IGCSE & O level - Scale Drawings (Section 3 - No. 22)

If the bearing of A from B is 200°, what is the bearing of B from A?

20°

140°

200°

380°

Since 200° is greater than 180°, 200° - 180° = 20°, 20 + 360 = 380 but 360 < 380 so 200 - 180 = 20 and then 180 + 20 = 140