U8 : L2 - Semester B Exam 1. a 180(n-2)
2. D XW = YZ and XY =WZ
3. b all quadrilaterals are polygons with four sides
4. b squares rectangles
5. c 135
6. b rectangle
7. d 15 and 75
8. b 40
9. c 9
10. c 39ft
11. b TRS ~ TPQ; SAS ~
12. c SAS theorem
13. A 24
14. D 2 sqrt 10 miles; 2 sqrt 35 miles
15. a x=10
16. a yes
17. b acute
18. b 11sqrt 2
19. b 33/2 + 11/2 sqrt 3
20. d 86.19
21. a sin a=15/17, cos A= 8/17
22. A 2.0mi
23. c 812 in^2
24. b 25.7
25. a 70 cm2
26. b 34.4ft
27. a 585 in
28. c 72,000
29. c 20 pi
30. a 30 pi
31. d 4.2025
32. c 24.0
33. a 472m^2 ; 486
34. c 20
35. a 748pi in
36. c 57 ft
37. a 1,802 m ^2
38. c 1:9
39. b 1,472.6 in
40. b 509.3
41. c 1,344.8
42. a 8:15
43. b 46
44. b 60
45. a 43
46. a 44
47. c 28
48. d (x+2)^2 + (y-3)^2=4
49. c (x+2)^2 + (y+5)^2 =241