Acute, because it is less than 90 degrees.
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What is a 79 degree of a third angle of a triangle
It is a scalene triangle that would have the given angles.
Supplementary angles are angles that add up to 180 degrees, ie. a straight angle. Therefore, the angle supplementary to 101 degrees would be 180-101=79 degrees.
It is greater than 90 degrees and less than 180 degrees so it is an obtuse angle.
It is acute