Though the problem tempts you to sketch the shapes and use your knowledge of isosceles triangles to determine x and your knowledge of similar polygons to determine y, there is no need. The problem does not state that polygons DEFGH and LMNOP are similar, and since there is no information indicating that their corresponding sides are in the same ratio or that corresponding angles are equal, this cannot be determined. There is not enough information to solve the problem, so the answer is d. When taking the test, be sure to read through the problems before spending time sketching shapes and solving equations. Determine whether or not you have enough information to solve the problem before delving into it.