If Z2 measures 120°. We can see that Angles 1 and Angles 2 are supplementary. Therefore, Angle 1 is 60 degrees.
What are supplementary 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.
That means, if supplementary angles are aligned adjacent to each other, their exterior sides will make a straight line.
If Z2 measures 120°
We can see that Angles 1 and Angles 2 are supplementary, which means that their sum is 180 degrees.
Angles 1 + Angles 2 = 180
Angles 1= 180 - 120
Angles 1 = 60
Therefore, Angle 1 is 60 degrees.
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