Algebra and Trigonometry, 2015a

772 CHAPTER 10 FURTHER APPLICATIONS OF TRIGONOMETRY
EXTENSIONS
50. Find the radius of the circle in Figure 18. Round to
the nearest tenth.
51. Find the diameter of the circle in Figure 19. Round
to the nearest tenth.
8.3
145° 3
110°
Figure 18
Figure 19
52. Find m ∠ADC in Figure 20. Round to the nearest
tenth.
A
53. Find AD in Figure 21. Round to the nearest tenth.
A
8
10
9
60°
B C D
Figure 20
B
12
53°
Figure 21
13
C
44°
D
54. Solve both triangles in Figure 22. Round each
answer to the nearest tenth.
A
48°
4.2
55. Find AB in the parallelogram shown in Figure 23.
A B
130°
12
10
46°
E
C
130°
B
48° 2
C
D
D
Figure 23
Figure 22
56. Solve the triangle in Figure 24. (Hint: Draw a
perpendicular from H to JK). Round each answer to
the nearest tenth.
H
57. Solve the triangle in Figure 25. (Hint: Draw a
perpendicular from N to LM). Round each answer
to the nearest tenth.
L
7
J
20°
10
Figure 24
K
5
74°
M
4.6
Figure 25
N