1. Triangle Theorems

2. Triangle Theorems A B C

3. Triangle Theorems A B C

4. Triangle Theorems Proof: A B C

5. Triangle Theorems Proof: Construct DE||BC passing through A A B C D E

6. Triangle Theorems Proof: Construct DE||BC passing through A A B C D E

7. Triangle Theorems Proof: Construct DE||BC passing through A A B C D E

8. Triangle Theorems Proof: Construct DE||BC passing through A A B C D E

9. Triangle Theorems Proof: Construct DE||BC passing through A A B C D E

10. A B C D

11. The exterior angle of any triangle is equal to the sum of the two opposite interior angles A B C D

12. The exterior angle of any triangle is equal to the sum of the two opposite interior angles A B C D

13. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: A B C D

14. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: Construct CE||BA A B C D E

15. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: Construct CE||BA A B C D E

16. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: Construct CE||BA A B C D E

17. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: Construct CE||BA A B C D E

18. The exterior angle of any triangle is equal to the sum of the two opposite interior angles Proof: Construct CE||BA A B C D E

19. Polygon Theorems A B C D

20. Polygon Theorems A B C D

21. Polygon Theorems A B C D

22. Polygon Theorems Proof: A B C D

23. Polygon Theorems Proof: A B C D

24. Polygon Theorems Proof: A B C D

25. Polygon Theorems Proof: (+) A B C D

26. Polygon Theorems Proof: (+) A B C D

27. Polygon Theorems Proof: (+) A B C D A B C D E

28. Polygon Theorems Proof: (+) A B C D A B C D E

29. Polygon Theorems Proof: (+) A B C D A B C D E

30. Polygon Theorems Proof: (+) Proof: A B C D A B C D E

31. Polygon Theorems Proof: (+) Proof: A B C D A B C D E

32. Polygon Theorems Proof: (+) Proof: A B C D A B C D E

33. Polygon Theorems Proof: (+) Proof: A B C D A B C D E

34. Polygon Theorems Proof: (+) Proof: (+) A B C D A B C D E

35. Polygon Theorems Proof: (+) Proof: (+) A B C D A B C D E

37. a b c d e

38. a b c d e

39. a b c d e

40. Exercise 8B; 1dg, 2c, 3dh, 5ace, 6ab ( iii ), 7b, 8bfh, 9ad, 10dh, 11ad, 12c, 16, 18, 20 a b c d e