Supplementary angles.
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No. They can only be exactly 180 degrees. By definition, a linear pair is a pair of two adjacent supplementary angles, so together they must form exactly 180 degrees.
An obtuse and an acute angle together are the two angles together that form a straight line. However, together they must add up to 180 degrees.
Supplementary angles are two angles that, when added together, are equal to 180 degrees.
The triangle has three exterior angles. Added together, their total is 180 degrees.(Same as the total of the three interior angles when they're added together.)
180 degrees