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21-06-2017
Mathematics

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Find the measure of an angle whose measure is 18 degrees less then its supplement

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21-06-2017

Two Angles are Supplementary when they add up to 180 degrees. So your angle a has a supplement 180-a, and 180-a-18 = a, which is an equation we can solve.

180-a-18 = a
162 = 2a
a = 81 (supplement is 99)

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