supplementary angles

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Related to supplementary angles: Alternate angles, Adjacent Angles

sup·ple·men·ta·ry angles

Two angles whose sum is 180°.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
She demonstrated the congruence of triangles ABD and ACD by SSS, and then triangles ABE and ACE by SAS in order to conclude the supplementary angles [angle] AEB and [angle] AEC are congruent and therefore right.
However, the "toy" can be revisited to revise the concepts of complementary and supplementary angles and their application in the proof.
They also can pair with a classmate and form complementary and supplementary angles in ways that defy forgetting.

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