Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsDetermining the Area of a Rhombushttp://demonstrations.wolfram.com/DeterminingTheAreaOfARhombus/]]>http://demonstrations.wolfram.com/DeterminingTheAreaOfARhombus/