Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsArea of a Triangle in the Poincaré Diskhttp://demonstrations.wolfram.com/AreaOfATriangleInThePoincareDisk/]]>http://demonstrations.wolfram.com/AreaOfATriangleInThePoincareDisk/Graphing Systems of Inequalitieshttp://demonstrations.wolfram.com/GraphingSystemsOfInequalities/]]>http://demonstrations.wolfram.com/GraphingSystemsOfInequalities/Summing an Arithmetic Progressionhttp://demonstrations.wolfram.com/SummingAnArithmeticProgression/]]>http://demonstrations.wolfram.com/SummingAnArithmeticProgression/Focal Attraction with Rotationhttp://demonstrations.wolfram.com/FocalAttractionWithRotation/]]>http://demonstrations.wolfram.com/FocalAttractionWithRotation/