Pass Check: Bearings
Measure bearings clockwise from north as three-digit angles, using diagrams.
Bearing
An angle measured clockwise from north, always given as three digits (e.g. 045°).
North line
A vertical reference line drawn at each point used to measure a bearing from.
Back bearing
The bearing of the return journey, found by adding or subtracting 180° from the original bearing.
Angle of depression/elevation
The angle below or above the horizontal when looking down or up at an object.
Quick check
Mixed quiz
1. Which formula correctly finds the back bearing when the original bearing is 200°?
2. Which compass direction corresponds to the bearing 045°?
3. Two parallel lines are cut by a transversal. One angle is 58 degrees. Find the co-interior (allied) angle.
4. Which angle fact applies to two angles that together make a right angle?
5. Two parallel lines are cut by a transversal. One angle is 46 degrees. Find the co-interior (allied) angle.
6. Two angles on a straight line are 50 degrees and x. Find x.
7. Two angles on a straight line are 65 degrees and x. Find x.
8. Two angles on a straight line are 55 degrees and x. Find x.