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Complementary angles

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complementary angle

–noun Mathematics.
either of two angles that added together produce an angle of 90°.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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complementary angles  


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pl.n.  Two angles whose sum is 90°.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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