All references are to the figure below. The distance between A and D is a, and the distance between D and C is x. 
Assuming that A = 17°, ?BDC = 43°, and c1 = 60. find h, x, and a.
A. h ? 18, x ? 19, a ? 39
B. h ? 40, x ? 40, a ? 90
C. h ? 41, x ? 44, a ? 90.
D. h ? 20, x ? 20, a ? 40
Answer: A
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