1. Complementary and Supplementary Angles. Objective: Learn to find Complementary and Supplementary Angles.

2. Complementary and Supplementary Angles: Complementary Angles  Two angles that add up to 90 degrees.  For example: 30 0 + 60 0 = 90 0 So 30 and 60 are complementary angles. Supplementary Angles Two angles that add up to 180 degrees. For example: 45 0 + 135 0 = 180 0. So, 45 and 135 are supplementary angles.

3. Examples: Example 1: Find the missing complementary angles. Example 2: Find the missing supplementary angle. ______________________________________________________

4. How to use a protractor to measure angles in 3 steps:

5. Homework: (part 1)

6. Homework: (Part 2)