Triangles L M N and X Y Z are shown. Side L M is blank, side M N is 3, and side N L is 2. Side X Y is 12, side Y Z is 9, and side Z X is blank. To prove that △LMN ~ △XYZ by the SSS similarity theorem using the information provided in the diagram, it would be enough additional information to know that LM is 3 units and XZ is 5 units. LM is 4 units and XZ is 6 units. LM is 5 units and XZ is 3 units. LM is 6 units and XZ is 4 units.