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Exercises 2.1, page 57

1. $90 °$
3. 4
5. $∠ E B D, ∠ D B C$
7. $∠ A B C$
9. $25 °$
11. BD, BC
13. $140 °$
15. $40 °$
17. $30 °$
19. $62 °$
21. $28 °$
23. $118 °$
25. $134 °$
27. $44 °$
29. $46 °$
31. 4.53 m
33. 3.40 m
35. $∠ B H C, ∠ C G D$
37. $∠ B C H, ∠ C H G ∠ H G C, ∠ D C G$
39. $∠ A H G, ∠ H G E$
41. $130 °$
43. $133 °$
45. 5.38 cm
47. $180 °$
49. Sum of angles is $180 °$ .

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