Lesson video

Hi, I'm Miss Davies.

In this lesson, we're going to be finding a point, given two others and two bearings.

Points A and B are show.

Point C is on a bearing of 275 degrees from A, and 65 degrees from B.

We've been asked to show the position of point C.

I had to start off with point A, drawing our north line, then measuring 275 degrees.

This has been partitioned into 180 degrees, and 95 degrees, as these some to give 275 degrees.

Next, we're going to measure 65 degrees from a point B.

Where these two lines intersect is point C.

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.

264 degrees can be partitioned into 180 degrees and 84 degrees.

Because we can't measure 264 degrees on a standard protractor.

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.

191 degrees should be partitioned into 180 degrees and 11 degrees, to make it easier to measure.

Point E and F are show, point G is on a bearing 45 degrees from E, and 10 degrees from F.

Pause the video to spot the mistake.

Well done if you noticed that point G isn't correctly on a bearing of 10 degrees, as this 10 degrees should have been measured in a clockwise direction.

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.

Measuring 307 degrees clockwise is the same as measuring 53 degrees anticlockwise.

Which is a slightly different method to partitioning.

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, a bearing of 324 degrees can either be measured as 180 degrees at 144 degrees, or it's 36 degrees anticlockwise.

That's all for this lesson.

Thanks for watching.