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Angle Measurements

This guide delves into the concept of measuring angles in degrees and provides clarity on using a protractor. It defines various types of angles: acute (0-90 degrees), obtuse (90-180 degrees), and right angles (exactly 90 degrees). Learn how to determine which scale on a protractor to use based on the angle you are measuring and ensure accurate measurements by aligning the protractor correctly. Happy measuring and exploring the world of geometry!

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Angle Measurements

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  1. Angle Measurements

  2. Degrees: Measuring Angles We measure the size of an angle using degrees. Example: Here are some examples of angles and their degree measurements.

  3. Protractor A device used to measure angles.

  4. 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/

  5. Acute Angles An acute angle is an angle measuring between 0 and 90 degrees. Example:

  6. Obtuse Angles An obtuse angle is an angle measuring between 90 and 180 degrees. Example:

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

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