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

2. Complementary and Supplementary Angles:
Complementary Angles
Supplementary Angles
Two angles that add up to 90 degrees.
For example: = So 30 and 60 are complementary angles.
Two angles that add up to 180 degrees.
For example: = 1800.
So, 45 and 135 are supplementary
angles.

3. Examples: Example 1: Find the missing complementary angles.
Example 2: Find the missing supplementary angle.
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4. How to use a protractor to measure angles in 3 steps:

5. Homework: (part 1)
Find the missing complementary or supplementary angle.

6. Homework: (Part 2)