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• Supplementary Angles

  These two angles (140° and 40°) are Supplementary Angles, because they add up to 180°. Notice that together they make a straight angle.

• Supplementary angles - Wikipedia, the free encyclopedia

  Supplementary angles are pairs of angles whose measures add up to 180 degrees. If the two supplementary angles are adjacent (i.e. have a common vertex and share just one side ...

• Angles and angle terms

  Supplementary Angles. Two angles are called supplementary angles if the sum of their degree measurements equals 180 degrees. One of the supplementary angles is said to be the ...