1. Complementary & Supplementary Angles

2. Complementary Angles Two angles are called complementary angles if the sum of their degree measurements equals 90 degrees. Example: These two angles are complementary.

3. These two angles can be "pasted" together to form a right angle!

4. Supplementary Angles Two angles are called supplementary angles if the sum of their degree measurements equals 180 degrees. Example: These two angles are supplementary.

5. These two angles can be "pasted" together to form a straight line!

6. Adjacent Angles Adjacent angles have a shared vertex and arm. Ex. Angles A & B are adjacent

7. Linear Pairs A pair of adjacent angles that forms when 2 lines intersect Ex. Angle ADC & Angle BDC are a linear pair Linear pair rule: If 2 angles form a linear pair, then they are supplementary

8. https://www.youtube.com/watch?v=GO20ZgUzl c0&list=PLW1zH15TmnByfL1TkOxJW- FuEcFvBH-x_&index=7 https://www.youtube.com/watch?v=GO20ZgUzl c0&list=PLW1zH15TmnByfL1TkOxJW- FuEcFvBH-x_&index=7

9. Complementary and Supplementary 1. Two angles are complementary. One measures 65 degrees. 2. Two angles are supplementary. One measures 140 degrees. Find the missing angle. Answer : 25 Answer : 40

10. Complementary and Supplementary Find the missing angle. You do not have a protractor. Use the clues in the pictures. 1. 2. x 55165 x X=35 X=15