In conjunction with a straight edge and a protractor.
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An obtuse angle is an angle that measures between 90 and 180 degrees. A 115-degree angle falls within this range, specifically closer to 90 degrees than 180 degrees. Visually, an obtuse 115-degree angle would appear wider than a right angle (90 degrees) but not as wide as a straight angle (180 degrees). It would resemble an open arm, wider than a right angle but not forming a straight line.
A pair of supplementary angles total 180 degrees. In this instance, the supplement to a 65 degree angle would be 180 - 65 = 115 degrees.
Not too sure of your question but if one angle measures 115 degrees then the other 3 angles are 115 degrees, 65 degrees and 65 degrees because opposite angles are equal.
115 degrees
It is an obtuse angle