supplementary angles

supplementary angle

noun Mathematics.
either of two angles that added together produce an angle of 180°.

1830–40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
supplementary angle
Compare complementary angle either of two angles whose sum is 180°

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
supplementary angles   (sŭp'lə-měn'tə-rē)  Pronunciation Key 
Two angles whose sum is 180°.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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