1. Proving Angles Congruent
Geometry 2-5

2. Adjacent angles – Two coplanar angles that share a common side, a common vertex and no interior points
Complementary Angles – Two angles whose measures have a sum of 90
Supplementary Angles – Two angles whose measures have a sum of 180
Angles

3. How to use a protractor
Review

4. Investigation

5. Linear pair – two angles formed from a ray and a line1 2
Definition

6. If two angles form a linear pair, then the measures of the angles add up to 180°2
Conjecture

7. Demo? 1 2
Conjecture

8. Investigation

9. Investigation

10. Vertical Angles – opposite angles formed from intersecting lines1 2
Definition

11. If two angles are vertical angles then they have equal measures1 2
Conjecture

12. Demo? 1 2
Conjecture

13. Proofs

14. Proofs can be in different forms

15. We have proven this, we never have to prove it again, and we can use this theorem to help other proofs.
Angles

16. Find the measure of each lettered angle without using a protractor
112°
112°
68°
68°
112°
Examples

17. Find the measure of each lettered angle without using a protractor
20°
70°
20°
110°
70°
Examples

18. Find the measure of each lettered angle without using a protractor
90°
163°
110°
27°
70°
Examples

19. Angles

20. Angles - Practice

21. Angles - Practice

22. Angles - Practice

23. Angles - Practice

24. Angles - Practice

25. Angles - Practice

26. Angles - Practice

27. Angles - Practice

28. Angles - Practice

29. Angles - Practice

30. Angles - Practice

31. Angles - Practice

32. Angles - Practice

33. Angles - Practice

34. Angles - Practice

35. Angles - Practice

36. Homework Pages 100 – 102 Day one: 1-19
Day two : 21, 29, 31, 35, 41, 48, 50
Homework

37. Honors Homework Pages 100 – 102 Day one: 1-19
Day two : 21, 29, 31, 35, 41, 48, 50, 55
Honors Homework