Complementary, Supplementary, Angle around a Point
Observe: Use the slider to Rotate line CD.
1. Look for Vertical Angles, Linear Pairs and Adjacent Angles. 
2. Look for a pair of Complementary Angles? What relationship exist between complementary angles?
3. Look for a pair of Supplementary Angles? What relationship exist between supplementary angles?
4. What is the sum of all of the angles around point O?
Questions: Move the slider toward the Left (But not all the way to the left...) 
5. Name one of each: an obtuse angle, acute angle, and right angle. 
6. Are  vertical angles? 
7. Are  adjacent angles? 
8. Are  complementary angles? 
9. Are  supplementary angles? 
10. Find