Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsGeometric Elements of a Circlehttp://demonstrations.wolfram.com/GeometricElementsOfACircle/]]>http://demonstrations.wolfram.com/GeometricElementsOfACircle/Areas of the Lens and Two Lunes of Two Intersecting Circleshttp://demonstrations.wolfram.com/AreasOfTheLensAndTwoLunesOfTwoIntersectingCircles/]]>http://demonstrations.wolfram.com/AreasOfTheLensAndTwoLunesOfTwoIntersectingCircles/Minimum Area between a Semicircle and a Rectanglehttp://demonstrations.wolfram.com/MinimumAreaBetweenASemicircleAndARectangle/]]>http://demonstrations.wolfram.com/MinimumAreaBetweenASemicircleAndARectangle/Minimizing the Perimeter of a Sector with Given Areahttp://demonstrations.wolfram.com/MinimizingThePerimeterOfASectorWithGivenArea/]]>http://demonstrations.wolfram.com/MinimizingThePerimeterOfASectorWithGivenArea/The Area of Part of an Isosceles Trianglehttp://demonstrations.wolfram.com/TheAreaOfPartOfAnIsoscelesTriangle/]]>http://demonstrations.wolfram.com/TheAreaOfPartOfAnIsoscelesTriangle/Problems on Circles V: External and Internal Common Tangentshttp://demonstrations.wolfram.com/ProblemsOnCirclesVExternalAndInternalCommonTangents/]]>http://demonstrations.wolfram.com/ProblemsOnCirclesVExternalAndInternalCommonTangents/Angular Displacementhttp://demonstrations.wolfram.com/AngularDisplacement/]]>http://demonstrations.wolfram.com/AngularDisplacement/Pairwise Tangent Circles Centered at the Vertices of a Trianglehttp://demonstrations.wolfram.com/PairwiseTangentCirclesCenteredAtTheVerticesOfATriangle/]]>http://demonstrations.wolfram.com/PairwiseTangentCirclesCenteredAtTheVerticesOfATriangle/Tangent Chord Anglehttp://demonstrations.wolfram.com/TangentChordAngle/]]>http://demonstrations.wolfram.com/TangentChordAngle/Angles Measured in Degrees and Radianshttp://demonstrations.wolfram.com/AnglesMeasuredInDegreesAndRadians/]]>http://demonstrations.wolfram.com/AnglesMeasuredInDegreesAndRadians/