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 = 36°, ?BDC = 42°, and c2 = 21, find h, x, and a.
A. h ? 12.3, x ? 13.7, a ? 3.3
B. h ? 14.1, x ? 15.6, a ? 3.7
C. h ? 12, x ? 14, a ? 3.3
D. h ? 14, x ? 16, a ? 3.7
Answer: D
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A. 
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