Using a Protractor to Measure Angles
Click here for a printable angle measurement worksheet
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 stepbystep instructions
The above animation is available as a
printable stepbystep 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
General
Angle Types
Angle relationships
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