# Lesson video

In progress...

Hello, my name is Mr Clasper and today we're going to be constructing perpendicular bisectors from a point to a line.

We're going to construct a perpendicular bisector from this point to the line.

This means my bisector must intersect the point, as well as intersecting the line at a right angle.

To do this accurately, we need a compass.

When you set your compass, you need to make sure that the distance is greater than that of the point to the line.

The reason for this is that we need to make two intersections on our line.

And if this distance is smaller, we won't be able to do it.

Once I've set my compass, I'm going to make a mark here and also here.

Now the next part is creating a bisector between the two points where my two curves intersect the line.

So, I need to set my compass so it's just over half of the distance and I'm going to make a curve.

And then I'm going to switch sides, place my point on the other intersection and make another curve.

Once I've done this, I can draw a line segment, joining the two intersections of my two curves.

Here's a question for you to try, pause the video to complete your task and click resume once you're finished.

So, remember the first step is to put your point of your compass on A and make two marks on the line given and from here, you can draw your bisector.

Just ensure that your perpendicular bisector is going through point A and it is perpendicular to the original line.

Here's a question for you to try.

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

And here is your solution to question two.

So similar to the last one, you need to make sure that your bisector is intersecting point A and it meets the original line at a right angle.

And that brings us to the end of our lesson.

Why not give the exit quiz a go? I'll hopefully see you soon.