A value just below 180 degrees. In whole numbers, 179 degrees, but 179.999... otherwise.
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If you mean how many degrees usually goes into an obtuse angle, most angles above ninety (90) degrees is and not equal to one hundred eighty (180) degrees is considered obtuse.
The most notable is a triangle, but every polygon can have an obtuse angle. An obtuse angle is anything measuring greater than 90 degrees.
The angle of the backs of chairs are at an obtuse angle to the seat. There are some straight back chairs that are 90 degrees but most are over 90 degrees.
It can have at most one obtuse angle.
A trapezoid can have a maximum of 2 obtuse angles. An obtuse angle is one that measures greater than 90 degrees. In a trapezoid, two of the angles are acute angles (less than 90 degrees) and the other two angles can be either acute or obtuse.