Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsEquilateral Triangles That Form a Starhttp://demonstrations.wolfram.com/EquilateralTrianglesThatFormAStar/]]>http://demonstrations.wolfram.com/EquilateralTrianglesThatFormAStar/