Acute angle: greater than 0 but less than 90 degrees
Right angle: 90 degrees
Obtuse angle: greater than 90 but less than 180 degrees
Reflex angle: greater than 180 but less than 360 degrees
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0-90o is an acute angle. 90o is a right angle. 90-180o is an obtuse angle. 180-360o is a reflex angle. There are only 4 angle names.
90 degrees is the measure of a right angle
1. Acute Angle 2. Right Angle 3. Obtuse Angle
equal angle
If the angle is over 90 degrees the angle is obtuse, smaller than 90 degrees the angle is acute and over 180 degress the angle is a reflex angle