Definition of supplementary angle in English:

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supplementary angle

noun

Mathematics
Either of two angles whose sum is 180°.
Example sentences
  • The supplementary angle of the interior angle, or the difference between the interior angle and 180°, is referred to as the ‘neighbour-avoidance index’.
  • This lesson introduces supplementary angles and prepares students to figure angle sums of polygons.
  • In this section, we are going to deal with vertical angles and supplementary angles in a different way.

For editors and proofreaders

Syllabification: sup·ple·men·ta·ry an·gle

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