Using a Protractor to Measure Angles

In the animation below, we use a protractor to measure two angles. A protractor usually has two scales, starting at zero at opposite ends. The animation shows how to use both scales.

The two angles are vertical angles and this also verifies that vertical angles are congruent.

InstructionsClick Next or Run to see a demonstration of how to use a protractor to measure an angle.

The animated diagram above shows how to use a protractor to measure angles. It shows how to measure two angles that are vertical angles and so should be equal in measure. It verifies that both the angles LQK and JQM are in fact equal.

For a description of the protractor see The Protractor
For a demonstration of using the protractor to draw an angle see Drawing Angles with a Protractor

Printable step-by-step instructions

The above animation is available as a printable step-by-step instruction sheet, which can be used for making handouts or when a computer is not available.

Try it yourself

Click here for a printable angle measurement worksheet. When you get to the page, use the browser print command to print as many as you wish. The printed output is not copyright.

Other angle topics


Angle Types

Angle relationships