This is the ambiguous case of solving oblique triangles.
If two sides and an angle is given,
1)if angle is acute-->5 solutions are possible
2)if angle is obtuse-->3 solutiones are possible
Sides: j=5.2 ,k=10.4,J=30°
~ a=10.4 b=5.2 B=30°
B is acute and a>b-->no of triangles possible from 5 cases is 0,1,2
Answer is 3 totally.
b)Sides: j=8 k=8.2 J=140°
~ a=8.2 b=8 B=140°
B is obtuse and a>b-->0 triangles possible
Hence the answers are:
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