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MG Measuring Angles Pacoima Charter School

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									              Degrees: Measuring Angles

We measure the size of an angle using degrees.
Example: Here are some examples of angles and
         their degree measurements.
        Protractor
A device used to measure angles.
Reading a Protractor
Date: 9/8/96 at 22:29:58 From: Bob Vanselow
Subject: Reading a Protractor Which side of a protractor scale do
you use?


Date: 9/9/96 at 11:39:23 From: Doctor Robert
Subject: Re: Reading a Protractor
I think that the easiest way to decide which scale to use is to look at the angle
you're measuring. If it is greater than a right angle (more than ninety degrees)
then use the scale that has numbers greater than 90. If the angle is obviously
acute (measures less than 90 degrees), use the scale which has numbers
less than 90. Of course you have to line up the protractor correctly with
the center point on the vertex of the angle and one of the rays of the angle
coincide with the line on the protractor. Happy measuring!
-Doctor Robert, The Math Forum Check out our web site!
http://mathforum.org/dr.math/
Acute Angles

An acute angle is an angle measuring between 0
and 90 degrees.

Example:
Obtuse Angles

An obtuse angle is an angle measuring between 90 and
180 degrees.

Example:
Right Angles
A right angle is an angle measuring 90 degrees.




Examples:

								
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