Less than 90 degrees is an acute angle, a 90 degree angle is a right angle, and an angle greater than 90 degrees is called an obtuse angle.
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An angle whose measure greater than 90 but less than 180 is an obtuse angle.
The measure of an angle whose sides overlap is 0 degrees. It is than not an angle, but rather a line.
Acute
Types of angles according to measure: 1. Acute angle- angle measure is less than 90 degrees 2. Right angle- angle measure is 90 degrees 3. Obtuse angle- angle measure is more than 90 degrees but less than 180 degrees. 4. Straight angle- angle measure is 180 degrees 5. Reflex angle- angle measure is more than 180 degrees but less than 360 degrees
A reflex angle is one whose measure is greater than 180 degrees but less than 360 degrees. Vertical angles can be reflexive.