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definitions

supplementary angle

noun Mathematics.

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

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Nearby words

supplemental air, supplemental plumage, supplemental security income, supplementally, supplementary, supplementary angle, supplementary angles, supplementary story, supplementation, suppletion, suppletive
Compare complementary angle.

Origin of supplementary angle

First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for supplementary angle

supplementary angle

noun

either of two angles whose sum is 180°Compare complementary angle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012