An angle less than 90 degrees is called an acute angle.
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Acute angle: greater than 0 but less than 90 degrees Right angle: exactly 90 degrees Obtuse angle: greater than 90 but less than 180 degrees Reflex angle: greater than 180 but less than 360 degrees
An angle greater than 90 degrees but less than 180 degrees in called an obtuse angle.
An angle that is less than 90 degrees is an acute angle.
An angle of 150 degrees is an obtuse angle because it is greater than 90 but less than 180 degrees
An angle that is less than 900 is called an acute angle.