An Obtuse angle is greater than 90 deg; an Acute angle is less then 90 deg.
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An angle that measures less than 90 degrees is considered acute. If it measures more than 90 degrees, it is obtuse.
A angle that is smaller than 90 degrees is an acute angle.
an angle that measures greater than 0 degrees and less than 90 degrees
A right angle measures 90 degrees
An angle that measures greater than 90 degrees but less than 180 degrees is an obtuse angle.