Taking bearings
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Bearings are used to indicate direction and are more precise than compass points. They are always measured clockwise from North. To measure the bearing from point A to point B, mark and draw the North line at A, measure the angle to B clockwise from North, and record it as a three-digit figure. The bearing of B from A will be different than the bearing of A from B, as the measurement is taken from the location and clockwise direction indicated.
Taking bearings
- 1. Bearings Using a protractor to calculate bearings for the IGCSE examination
- 2. Bearings… • Tell us in what direction something is • Are more accurate than using compass points • Always measure the angle clockwise from North
- 4. Important! Always pay attention to the direction you will be taking the bearing from The bearing of A to B will be completely different to the bearing B to A.
- 5. Measuring bearings… Find the bearing of B from A. • Mark the North line on at A (if there isn’t a North line draw one in) • Measure the angle clockwise from the North line to B A B x x • Draw the line connecting A to B.
- 6. Measuring bearings… Find the bearing of B from A. • Place your protractor over the north line with 0° at the top. • Give the answer as a three- figure bearing The bearing of B from A is 135°. A B
- 7. Measuring bearings… Find the bearing of A from B. • Mark the North line on at B (if there isn’t a North line draw one in) • Measure the angle clockwise from the North line to A A B x x • Draw the line connecting B to A.
- 8. Measuring bearings… Find the bearing of A from B. • Place your protractor over the north line with 0° at the bottom. • The angle has gone past 180° so you will need to add your measurement to 180° A B x x • Because you are measuring clockwise you need to measure the exterior angle.
- 9. Measuring bearings… Find the bearing of A from B. • The measurement from the bottom 0° is 135°. The bearing of A from B is 315°. A B x x • 135° + 180° = 315°. 135 °