The equation represents the relationship between their measures is
m1 + m2 = 180.
What are complementary angles?
Two angles whose sum is 90° are called complementary angles.
Two angles whose sum is 180° are called supplementary angles.
If a straight line is intersected by a line, then there are two angles form on each of the sides of the considered straight line.
Those two-two angles are two pairs of supplementary angles.
It is given that angles 1 and 2 are supplementary.
The equation represents the relationship between their measures is
m1 + m2 = 180
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