Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsAreas of the Lens and Two Lunes of Two Intersecting Circleshttp://demonstrations.wolfram.com/AreasOfTheLensAndTwoLunesOfTwoIntersectingCircles/]]>http://demonstrations.wolfram.com/AreasOfTheLensAndTwoLunesOfTwoIntersectingCircles/Trigonometric Functions for a Right Trianglehttp://demonstrations.wolfram.com/TrigonometricFunctionsForARightTriangle/]]>http://demonstrations.wolfram.com/TrigonometricFunctionsForARightTriangle/Walking with an Umbrellahttp://demonstrations.wolfram.com/WalkingWithAnUmbrella/]]>http://demonstrations.wolfram.com/WalkingWithAnUmbrella/Ball in V Groove Geometryhttp://demonstrations.wolfram.com/BallInVGrooveGeometry/]]>http://demonstrations.wolfram.com/BallInVGrooveGeometry/Moving a Couch around a Cornerhttp://demonstrations.wolfram.com/MovingACouchAroundACorner/]]>http://demonstrations.wolfram.com/MovingACouchAroundACorner/Two Wheel Belthttp://demonstrations.wolfram.com/TwoWheelBelt/]]>http://demonstrations.wolfram.com/TwoWheelBelt/Person Walking Away from Spotlighthttp://demonstrations.wolfram.com/PersonWalkingAwayFromSpotlight/]]>http://demonstrations.wolfram.com/PersonWalkingAwayFromSpotlight/