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A Pleasant Arrangement of Rectangles

Inspired by #mathart from Geometry Daily #425. http://geometrydaily.tumblr.com/post/48773482635/425-level-a-new-minimal-geometric-composition There's quite a pleasant relationship among similar rectangles. The tool allows you to draw a similar rectangle with the corners of one side and a desired ratio.
More GeoGebra at mathhombre.blogspot.com