Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsConstruction for Three Vectors with Sum Zerohttp://demonstrations.wolfram.com/ConstructionForThreeVectorsWithSumZero/]]>http://demonstrations.wolfram.com/ConstructionForThreeVectorsWithSumZero/