2. Any two angles whose sum is 180 degrees. Supplementary Angles

3. 70+x=180 x=110 Example:

4. Complementary Angles Any two angles whose sum is 90 degrees.

5. Example: x+(x+30)=90 2x+30=90 2x=60 x=30

6. Two angles across from each other on intersecting lines. They are always congruent! Vertical Angles

7. Examples: b= ____ degrees

8. Adjacent Angles Two angles that are next to each other and share a common side.

9. Example: Common side

10. Linear Pair Two angles that are adjacent and supplementary. They form a straight line!

11. Example: 9x+3x=180 12x=180 X=15

13. Evaluation 1)What is the value of x? A.84 degrees B.24 degrees C.21 degrees D.62 degrees

14. Evaluation 1)What is the value of x? A.66 degrees B.132 degrees C.21 degrees D.52 degrees

15. Evaluation 1)What is the value of x? A.66 degrees B.55 degrees C.21 degrees D.12 degrees