Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsHanegraaf's Rectangular Block of Size 2×1×1 to a Cube Dissectionhttp://demonstrations.wolfram.com/HanegraafsRectangularBlockOfSize211ToACubeDissection/]]>http://demonstrations.wolfram.com/HanegraafsRectangularBlockOfSize211ToACubeDissection/