find an angle which is two thirds of its complement
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Let the angle be x
compliment = 180-x
x = 2/3(180-x)
x = 120 - 2x/3
x + 2x/3 = 120
5x/3 = 120
x = 3*120/5 = 72
compliment = 180-x
x = 2/3(180-x)
x = 120 - 2x/3
x + 2x/3 = 120
5x/3 = 120
x = 3*120/5 = 72
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