Hello and welcome to NinetyEast. Today 
we're going to learn about how to 
measure angles. 
To be able to do so, you'll need an instrument 
called a protractor (like this). There are full circle 
ones, and half ones. Use whatever you have.
Now there are three steps involved in actually 
measuring an angle. The first two involve lining 
up the protractor correctly - so let's do that first.
We'll get our angle, and then we'll bring the 
protractor down over it. 
The first step in measuring the angle is making 
sure that the vertex of the angle is lined up with 
the center of the protractor. 
And that's over here.
Next we need to make sure that one of the arms 
is lined up with the horizontal 0° line; and we 
can see that's the case here.
Next we need to make sure that one of the arms 
is lined up with the horizontal 0° line; and we 
can see that's the case here.
The last step is reading the position of the 
second arm,
The last step is reading the position of the 
second arm,
and that will tell us the exact angle 
measurement.
Let's look at it here. We've got the arm 
intersecting with this point on the protractor, and 
that refers to 121, 2, 3, 4,125 degrees. 
So this angle is 125°.
Now so long as you follow these three simple 
steps, you can measure any angle:
align the vertex with the center of the protractor; 
line up one arm with the horizontal 0° line; and 
then read the position of the second arm to 
determine what the angle size is.
We hope that you found this video useful. As 
always there's a link to the written tutorial in the 
description box below, 
as well as a worksheet of exercises for you to 
work through in your own time. Have a look 
through them and if you've got any questions, 
don't hesitate to either directly message us 
through YouTube or send us an email to 
NinetyEastTV@gmail.com.
Thanks everyone!
