Yes because the straight line is equivalent to 180 degrees
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They are supplementary angles / The sum of their measures are 180 degrees.
Supplementary angles add up to 180 degrees
Supplementary angles add up to 180 degrees
It is a straight line because angles on a straight line add up to 180 degrees but angles greater than 180 degrees are reflex angles
same side angles add upt to 180 degrees.