SOLUTION: what is the measure of an angle that is supplementary to 102 degrees

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Question 638933: what is the measure of an angle that is supplementary to 102 degrees
Answer by MathLover1(20850) About Me  (Show Source):
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Angles are supplementary if they add to 180°.
alpha%2Bbeta=180°
given:
alpha=102°
find beta
beta=180-alpha
beta=180-102
beta=78°