Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsDividing Circles, Rectangles, and Triangles into Equal Pieceshttp://demonstrations.wolfram.com/DividingCirclesRectanglesAndTrianglesIntoEqualPieces/]]>http://demonstrations.wolfram.com/DividingCirclesRectanglesAndTrianglesIntoEqualPieces/