Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRoads and Wheelshttp://demonstrations.wolfram.com/RoadsAndWheels/]]>http://demonstrations.wolfram.com/RoadsAndWheels/Center of Mass of a Polygonhttp://demonstrations.wolfram.com/CenterOfMassOfAPolygon/]]>http://demonstrations.wolfram.com/CenterOfMassOfAPolygon/Bicycle or Unicycle Tracks?http://demonstrations.wolfram.com/BicycleOrUnicycleTracks/]]>http://demonstrations.wolfram.com/BicycleOrUnicycleTracks/Voronoi Polygons in an Archimedean Spiralhttp://demonstrations.wolfram.com/VoronoiPolygonsInAnArchimedeanSpiral/]]>http://demonstrations.wolfram.com/VoronoiPolygonsInAnArchimedeanSpiral/The Three-Gap Theoremhttp://demonstrations.wolfram.com/TheThreeGapTheorem/]]>http://demonstrations.wolfram.com/TheThreeGapTheorem/Simpson's Paradoxhttp://demonstrations.wolfram.com/SimpsonsParadox/]]>http://demonstrations.wolfram.com/SimpsonsParadox/The Bicycle Paradoxhttp://demonstrations.wolfram.com/TheBicycleParadox/]]>http://demonstrations.wolfram.com/TheBicycleParadox/The Facilities Location Problemhttp://demonstrations.wolfram.com/TheFacilitiesLocationProblem/]]>http://demonstrations.wolfram.com/TheFacilitiesLocationProblem/Tours through a Graphhttp://demonstrations.wolfram.com/ToursThroughAGraph/]]>http://demonstrations.wolfram.com/ToursThroughAGraph/The Buffon Noodle Problemhttp://demonstrations.wolfram.com/TheBuffonNoodleProblem/]]>http://demonstrations.wolfram.com/TheBuffonNoodleProblem/Perfect 1-Factorizations of Graphshttp://demonstrations.wolfram.com/Perfect1FactorizationsOfGraphs/]]>http://demonstrations.wolfram.com/Perfect1FactorizationsOfGraphs/Four-Coloring Planar Graphshttp://demonstrations.wolfram.com/FourColoringPlanarGraphs/]]>http://demonstrations.wolfram.com/FourColoringPlanarGraphs/Trajectory on a Polyhedron from a Vertex to Itselfhttp://demonstrations.wolfram.com/TrajectoryOnAPolyhedronFromAVertexToItself/]]>http://demonstrations.wolfram.com/TrajectoryOnAPolyhedronFromAVertexToItself/Nonplanar Rectangular Heptagonshttp://demonstrations.wolfram.com/NonplanarRectangularHeptagons/]]>http://demonstrations.wolfram.com/NonplanarRectangularHeptagons/Rolling Ball inside a Cylinderhttp://demonstrations.wolfram.com/RollingBallInsideACylinder/]]>http://demonstrations.wolfram.com/RollingBallInsideACylinder/3D Billiard Loop in a Rectangular Boxhttp://demonstrations.wolfram.com/3DBilliardLoopInARectangularBox/]]>http://demonstrations.wolfram.com/3DBilliardLoopInARectangularBox/Flying to the Moonhttp://demonstrations.wolfram.com/FlyingToTheMoon/]]>http://demonstrations.wolfram.com/FlyingToTheMoon/Discus Flighthttp://demonstrations.wolfram.com/DiscusFlight/]]>http://demonstrations.wolfram.com/DiscusFlight/Paths inside a Polygonhttp://demonstrations.wolfram.com/PathsInsideAPolygon/]]>http://demonstrations.wolfram.com/PathsInsideAPolygon/Penrose's Train Challengehttp://demonstrations.wolfram.com/PenrosesTrainChallenge/]]>http://demonstrations.wolfram.com/PenrosesTrainChallenge/