Common Core State Standard: 8.G.4 

Grade  8 
Subject  MATH 
Domain  Geometry 
Theme  Understand congruence and similarity using physical models, transparencies, or geometry software 
Standard  Understand that a twodimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar twodimensional figures, describe a sequence that exhibits the similarity between them. 
Reference URL  http://www.corestandards.org/Math/Content/8/G 