Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsEqual-Area Parallelograms Using Determinantshttp://demonstrations.wolfram.com/EqualAreaParallelogramsUsingDeterminants/]]>http://demonstrations.wolfram.com/EqualAreaParallelogramsUsingDeterminants/Special Prime Circleshttp://demonstrations.wolfram.com/SpecialPrimeCircles/]]>http://demonstrations.wolfram.com/SpecialPrimeCircles/Inscribed Triangles in Polygonshttp://demonstrations.wolfram.com/InscribedTrianglesInPolygons/]]>http://demonstrations.wolfram.com/InscribedTrianglesInPolygons/Constructing a Parabola from Tangent Circleshttp://demonstrations.wolfram.com/ConstructingAParabolaFromTangentCircles/]]>http://demonstrations.wolfram.com/ConstructingAParabolaFromTangentCircles/Rhomboidal Starshttp://demonstrations.wolfram.com/RhomboidalStars/]]>http://demonstrations.wolfram.com/RhomboidalStars/Number of Handshakeshttp://demonstrations.wolfram.com/NumberOfHandshakes/]]>http://demonstrations.wolfram.com/NumberOfHandshakes/