Question

The bearing of A from B, and the bearing of B from A, always differ by 180. Why is that?

Answer 1

Step-by-step explanation:

We can extend the line from A to B, then rotate through 180° to head in the opposite direction. We can see from the diagram above that the bearing from B to A is 300°, because 120° + 180° = 300°. REMEMBER: Bearings in exactly opposite directions are called back bearings and are always 180° apart...!

Answer 2

Answer:

We can extend the line from A to B them rotate through 180°to head in the opposite direction. we can see from B to A is 300°, because 120°+180°=300°, remember: bearing in exactly opposite directions are called back bearing an are always 180° opposite