Question 349657
Hi,
Note: the sum of supplementary angles is 180
Let x represent one of the angles.  (3*x) the other angle.
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x + (3x) = 180
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4x = 180

x = 45 
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Definition of an obtuse angle. An angle between (but not including) 90deg and 180 deg
the other angle: 3*x = 135 is the obtuse angle
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check you answer
45 + 135 = 180