An angle that is 91 degrees would be an obtuse angle. Anything above 90 degrees is obtuse while anything below 90 is an acute angle.
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An obtuse angled triangle.
An obtuse angle is a measurement of 91 degrees to 179 degrees. If it is 90 degrees, it is a right angle. If it is 1 degree to 89 degrees it is an acute. If it is 180 degrees it is a straight angle.
An obtuse angle. A right angle has an exact measure of 90 degrees; an obtuse angle has a measure greater than 90 degrees.
An obtuse angle is any angle that is between 91 degrees and 179 degrees. It can be added to a supplementary acute angle to form a straight line.
a striaght angle is always 180% but a obtuse angles is 91% OR higher