*Types of Angles* 1. *Acute Angle*: An angle whose measure is between 0° and 90°. 2. *Right Angle*: An angle whose measure is exactly 90°. 3. *Obtuse Angle*: An angle whose measure is between 90° and 180°. 4. *Straight Angle*: An angle whose measure is exactly 180°. 5. *Reflex Angle*: An angle whose measure is greater than 180°.