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All of the angles in a triangle must add up to exactly 180 degrees. 89, 90, and 91 degrees equal up to 270 degrees. So these angles are not characteristics of a triangle.
A right triangle is a triangle that contains a 90 degree angle, an obtuse triangle contains an angle that is from 91 degrees to 179 degrees.
The measure can be anywhere from 91 degrees to 179 degrees. 90 degrees is a right angle and 180 degrees is a straight line.
equiangular triangle
2 of the angles in a triangle are 32 and 91 degrees. What is the 3rd angle?