You have to use the Law of Sines to find K. But indirectly, since you haven't got an angle measure for K or a side measure of k. We have to find J and then use the Triangle Angle-sum theorem to find K. [tex] \frac{sin102}{17} = \frac{sinJ}{10} [/tex]. Solve for J to get J = 35.1. 180 - 102 - 35.1 = 42.9 so K is 42.9