Lesson video

In this lesson, we're going to be measuring and using bearings.

Bearings are always measured clockwise from North.

In this example, we have been asked to work out the bearing of B from A.

This means we're starting at point A, and we need to draw our North line up.

We're going to measure from the North line to the line segment, connecting point A and point B.

This is 80 degrees.

But bearings are recorded using three figures, meaning that the bearing of B from A is 080 degrees.

In our next example, we've been asked for the bearing of A from B.

Our North line is going to go on point B.

We need to measure the angle clockwise from North to the line segment connecting the points A and B.

We're going to separate this into 180 degrees on the straight line, and the smaller angle to the left of this line.

If we measure from this line to the connecting line segment, it is 65 degrees.

This means that the bearing of A from B is 245 degrees.

Here is a question for you to try.

Pause the video to complete your task and resume once you're finished.

Here is the answer, bearing of A from B is 112 degrees as it is measured in a clockwise direction from North.

Here's a question for you to try.

Pause the video to complete your task and resume once you're finished.

Here is the answer.

This bearing is measured from North in a clockwise direction.

Point D is five centimetres from point C at a bearing of 095 degrees.

We're going to mark the point D.

Our point D is on a bearing from point C, we're going to measure 95 degrees from the North line.

Then we're going to measure five centimetres along this line, this gives us point D.

In our next example, we've been told that the boat is 28 kilometres from the lighthouse at a bearing of 255 degrees.

We've also been told that this scale of our diagram is one centimetre is equal to four kilometres.

Starting off by measuring 180 degrees from our North line, and then a further 75 degrees as 180 at 75 is 255.

We're then going to use our scale to work out the distance on our diagram that represents 28 kilometres.

This is going to be seven centimetres.

This is the point of the boat.

Here's some questions for you to try.

Pause the video to complete your task and resume once you're finished.

Here's the answer, both bearings start at point A and should be measured in a clockwise direction from North.

Here's a question for you to try.

Pause the video to complete your task and resume once you're finished.

Here's the answer.

The scale tells us that one centimetre is equal to five miles.

This means this 30 miles is equal to six centimetres.

That's all for this lesson.

Thanks for watching.