A 60-degree angle is the supplementary angle of a 120-degree angle. A linear pair forms a straight angle which contains 180º, so you have 2 angles whose measures add to 180, which means they are supplementary. either of two angles which together form an angle of 180 degrees (a straight line). If two angles form a linear pair, the angles are supplementary. DEFINITION OF SUPPLEMENTARY ANGLE HOW TOLearn how to solve trigonometric equations with supplementary angles, sine. Meaning, pronunciation, picture, example sentences, grammar, usage notes. If the sum of two angles is 180 degrees, those angles are supplementary. Supplementary angles have two properties: Only two angles can sum to 180° - three or more angles may sum to 180° or 2 radians, but they are not considered supplementary. Definition of supplementary-angle noun in Oxford Advanced Learners Dictionary.
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