# How to Measure Angles

The below video covers the written tutorial below - how to measure angles.

## How do we measure angles?

We measure angles using a tool called a *protractor*.

Take the below angle for instance. Roll over it with your mouse to see how to measure the angle.

- The vertex of the angle aligns with the center of the protractor.
- One arm sits on the horizontal zero line.
- The position of the other is used to determine the size of the angle. In this case it is 40 degrees.

## What units do we use to measure angles?

You may have already guessed it, but for completion sake we just wanted to mention that angles are measured in *degrees*. There are **360 degrees in a full turn** or circle. Why 360? Check out this branch tutorial. At the end of the day, you don't need to know why there are 360 degrees in a circle - you just need to learn how to use them efficiently. Let's now move on to naming conventions for different types of angles.

## Exercise Worksheet

An exercise worksheet is available below to work through to consolidate your understanding of how to measure angles. Click on this image to download the document: