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Bearings lesson
Bearings are used to describe direction and position more accurately than compass points alone. They are always three figures measured clockwise from North. To measure the bearing from point A to point B, draw a line from A to B and measure the angle clockwise from the North line at A. To measure the bearing from B to A, do the same but measure the exterior angle clockwise from the North line at B, and add 180 degrees if the measurement is less than 180. Practice examples are provided to help understand how to measure bearings.
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Bearings lesson
- 1. Bearings L.I. To usecompass bearings to describe position.
- 2. Bearings… • Tell usin what direction something is • Are more accurate than using compass points • Are always three figures • Always measure the angle clockwise from North
- 3. Matching compass points… 000° 338° 023° 315° 045° 293° 068° 270° 090° 248° 113° 225° 135° 203° 158° 180°
- 4. Measuring bearings… Find thebearing of B from A. • Mark the North line on at A (if there isn’t a North line draw one in) • Draw the line connecting A x A to B. • Measure the angle x clockwise from the North line B to B
- 5. Measuring bearings… Find thebearing of B from A. • Place your protractor over the north line with 0° at the top. • Give the answer as a three- A figure bearing The bearing of B from A is 135°. B
- 6. Measuring bearings… Find thebearing of A from B. • Mark the North line on at B (if there isn’t a North line draw one in) • Draw the line connecting B x A to A. • Measure the angle x clockwise from the North line B to A
- 7. Measuring bearings… Find thebearing of A from B. • Place your protractor over the north line with 0° at the x A bottom. • Because you are measuring x clockwise you need to B measure the exterior angle. • The angle has gone past 180° so you will need to add your measurement to 180°
- 8. Measuring bearings… Find thebearing of A from B. 135 ° • The measurement from the bottom 0° is 135°. x A • 135° + 180° = 315°. x The bearing of A from B is 315°. B
- 9. Now it’s yourturn. http://www.ngfl-cymru.org.uk/vtc/ngfl/maths/echalk/bearings/
- 10. • Clay, Izzy,Wiremu, Liam work on computers with Whaea Talia. • Tanya, Xuan, Dacmen, Ella come to the mat with me. • The rest of the class work on the worksheet handed around. Do Task 23. When you get to number 10 come and get a school map from the front.