Looking Back at your Lesson
From your previous lesson you have learned about the different kinds of angles and other terms related to it See table 1 below:

1. Acute Angle an angle whose measure is greater than 0' but less than 90
2. Obtuse Angle an angle whose measures greater than 90° but less than 180°
3. Right Angle an angle whose measure is exactly 90°
4. Straight Angle an angle whose measure is exactly 180°
5. Vertex a point where two or more line segments meet
6. Common Side a side shared by two angles​