1. Vertical Angles Supplementary Angles Complementary Angles

2. 75º 105º When two lines intersect, they make vertical angles. They are opposite and equal to each other. VERTICAL ANGLES 75º 105º

3. VERTICAL ANGLES x 127º Ex: Find the measure of the missing angle.

4. VERTICAL ANGLES x 127º Ex: Find the measure of the missing angle. Ans: x = 127º

5. SUPPLEMENTARY ANGLES 130º50º Supplementary angles add up to 180º 130º + 50º = 180º

6. SUPPLEMENTARY ANGLES b34º Ex: Find the measure of the missing angle.

7. SUPPLEMENTARY ANGLES b34º Ex: Find the measure of the missing angle. Ans: b = 146º

8. COMPLEMENTARY ANGLES Complementary Angles add up to 90°. 40º 50º 50º + 40º = 90º

9. Ex: Find the measure of the missing angle. COMPLEMENTARY ANGLES 42º a

10. Ex: Find the measure of the missing angle. COMPLEMENTARY ANGLES 42º a Ans: a = 58º

11. Let’s Practice!

12. #1 45º? Find the measure of the missing angle.

13. #2 65º ?

14. c d Can you find the pair of vertical angles in this diagram? #3

15. #4 35º ?

16. #5 50º ?

17. #6 152º ?

18. #7 40º ?

19. #8 142º x Find the measure of angle x and y. y

20. #9 51º ?

21. #10 c 77º Find the measure of angle b and c.