179 degrees
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Not too sure of the question but in general an obtuse angle is greater than 90 but less than 180 degrees
The angles are: 150+30 = 180 degrees
Well if it has 180 degrees over all, and the two base angles have to be congruent, then the equation is 180-120=2x or each base angle is 30 degrees.
the supplement of an 82 degrees angle would be 98 degrees. To find the supplement of an angle, take the degrees of the angle you were given and subtract it from 180.
That would be an obtuse angle measuring 150 degrees. I do not know of a proper name for it.