Angles Worksheets - Geometry - Math Fun Kids Worksheets The different types of angles are: 1. Acute angle- Less than 90° 2. Right angle- 90° 3. Obtuse angle- Greater than 90°; less than 180° 4. Straight angle- Exactly 180° 5. Reflex angle- Greater than 180°; less than 360° 3. What is an angle in geometry? Two rays meeting at a common end point form an angle.