5.7 Oblique Triangles, page 366
1. α=54°
3. α=22°
5. c=10
7. a. SSS; law of cosines; 2 sig figs
b. SSS; law of cosines; 2 sig figs
9. a. AAS; law of sines; 2 sig figs
b. AAA; no solution because three angles do not yield a unique triangle.
11. a. SSA; law of cosines; 3 sig figs
b. SSA; law of cosines; 3 sig figs
25. No solution
31. 13.6 sq units
33. 37 sq units
35. 560 sq units
37. 560 sq units
39. 54 sq units
41. 2,150 sq units and 911 sq units
43. The distance is 249 mi.
45. The cable is 42.8 ft.
47. The length of the tower is 178.9 ...
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