1.14.6. Computation of Included Angles from Bearings

Try these first

1. 1.

   What is a bearing?

   Hint

   Think about how we describe directions.

2. 2.

   What does WCB stand for?

   Hint

   Consider how bearings are measured.

3. 3.

   What is the included angle if the reduced bearings are 45° and 135°?

   • 90°
   • 180°
   • 270°
   • 45°

   Hint

   Think about the angular difference.

4. 4.

   True or False: Local attraction has no effect on compass readings.

   • True
   • False

   Hint

   Consider what can interfere with magnetic fields.

5. 5.

   You measure two lines with bearings of 85° and 275°. Find the included angle and explain your reasoning.

   Hint

   Think about their relative positions.

6. 6.

   Calculate the included angle for the reduced bearings: 60° and 240°. Justify your calculation method.

   Hint

   Identify their quadrant positions here.