Question

The the bearing of A from B is 30° what is the bearing of B from A

Answer 1

To find the bearing of B from A:

1. Find the measure of angle y:

Given angle and angle y are supplementary angles (add up to 180º):

`\begin{gathered} 30º+y=180 \\ y=180-30 \\ y=150 \end{gathered}`

2. The sum of angle x and angle y is 360 (angle x is th bearing of B from A):

`\begin{gathered} x+y=360 \\ x+150=360 \\ x=360-150 \\ x=210 \end{gathered}`

Then, the bearing of B from A is 210º