成人快手

Maps - WJECBearings

Maps and scale drawings form a crucial part of everyday life. Scale drawings are useful in a variety of careers from surveyors, to town planning and architecture. We also need to understand bearings.

Part of Maths Numeracy (WJEC)Geometry and Measure

Bearings

Bearings are an effective way to describe a direction. There are some rules to using bearings that you need to be aware of to use them effectively:

  • bearings are always measured clockwise from north
  • bearings always have three numbers, and those numbers describe the angle from north
A protractor with line A marking 0 degrees and Line B marking 135 degrees

To find the bearing of B from A:

  • place your protractor over the north line with 0掳 at the top
  • give the answer as a three-figure bearing

The bearing of B from A is 135掳.

Examples

To describe this direction:

A line marked as N with a line showing direction of travel as 125 degrees from N

We would use a bearing of 125掳. This is obtained by placing the protractor so the 0 line is on north and measuring the angle from north to the direction of travel.

3 angles bearing 60 degrees, 240 degrees and 330 degrees

These three directions can be described with the bearings below them. Pay particular attention to the first diagram 鈥 notice that the angle is 60掳 but the bearing is 060掳.

Bearings are always three figures, and are always measured clockwise from north.

Question

What is the bearing of A from B?

Two lines at angle B, one marked N and one marked A