Using a Protractor
This is a protractor, it helps you measure angles (in degrees):
Protractors are fun and easy to use
Have a look at this animation (press the play button) to see how to make a neat angle using a protractor and ruler:
Protractors usually have two sets of numbers going in opposite directions.
Be careful which one you use!
When in doubt think "should this angle be bigger or smaller than 90° ?"
Have a Go Yourself!
Try to measure the angles A, B and C inside the triangle. Drag the protractor and rotate it using arrow keys.
Be careful which angle you read from the protractor. Hint: if you get them all correct, they will add up to 180°.