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Measure of an angle that is twice as large as its supplement

User Merrie
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x + y = 180
x = 2y (x is the angle twice as large)
2y + y = 180 = 3y
60 = y
2y = x = 60(2) = 120
x = 120 and is therefore the measure of an angle that is twice as large as its supplement.
User Gottfried
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