We can use the Law of Sines to find the two missing angles Select sin B sin 22 sin C sin 0 78 51 3 14 2 sin 22 10 9 22 7 sin 22 10 9 sin 0 488 29 2 B Select 0 78 0 488 The problem with those two angles is Select Find the Missing Angles Select Since Select is the longest side it must be opposite the largest angle which must mean B is an obtuse angle with a reference angle of 51 3 sin B and C 29 2