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University of Regina (Canada)
University of Regina: Math Central: Shape Preserving Transformations
This is a site that discusses transformations and the processes.
Other
World of Escher: House of Stairs
This site provides an image of M.C. Escher's famous lithograph, "House of Stairs," which can be enlarged by clicking on it. Included is a quote, which briefly explains how this piece of art introduces "[a] playful element" to "the...
University of Regina (Canada)
University of Regina: Math Central: Symmetry and Translations
This University of Regina site gives some history and definitions about translations and symmetry.