Which statement best describes the error in the statement about the diagram? in order to use the linear pair perpendicular theorem, two of the angles made by x and z need to be marked congruent. in order to use the lines perpendicular to a transversal theorem, both lines y and z must be marked as perpendicular to the transversal, line x. in order to use the vertical angle theorem, the angle vertical to the marked angle should also be marked as perpendicular to the transversal. in order to use the alternate interior angles converse, one of the angles made by lines x and y also needs to be marked as a right angle.