Sum of adjacent angles on a straight line.
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they are called supplementary angles. a straight line has 180 degrees each side and two adjacent angles forming 180 degrees are called supplementary angles.
A pair of adjacent angles whose non-common sides are opposite rays are called a linear pair. The measure of a straight angle is 180 degrees, so a linear pair of angles must add up to 180 degrees.
two adjacent angles formed by two intersecting tines are
Those angles are called complementary.Those angles are called complementary.Those angles are called complementary.Those angles are called complementary.
Well, they're called vertically adjacent angles. They have the property that they are supplementary, because the non-adjacent sides form a straight line.