Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsTheobald's Dissection of a Heptagon to a Trianglehttp://demonstrations.wolfram.com/TheobaldsDissectionOfAHeptagonToATriangle/]]>http://demonstrations.wolfram.com/TheobaldsDissectionOfAHeptagonToATriangle/Simple 2-Column Polyominoes on the Hexagonal Latticehttp://demonstrations.wolfram.com/Simple2ColumnPolyominoesOnTheHexagonalLattice/]]>http://demonstrations.wolfram.com/Simple2ColumnPolyominoesOnTheHexagonalLattice/Three Hinged Dissections of Squareshttp://demonstrations.wolfram.com/ThreeHingedDissectionsOfSquares/]]>http://demonstrations.wolfram.com/ThreeHingedDissectionsOfSquares/Polyform Explorerhttp://demonstrations.wolfram.com/PolyformExplorer/]]>http://demonstrations.wolfram.com/PolyformExplorer/The Excentral Triangle and a Related Hexagonhttp://demonstrations.wolfram.com/TheExcentralTriangleAndARelatedHexagon/]]>http://demonstrations.wolfram.com/TheExcentralTriangleAndARelatedHexagon/Roulette: A Comfortable Ride on an n-gon Bicyclehttp://demonstrations.wolfram.com/RouletteAComfortableRideOnAnNGonBicycle/]]>http://demonstrations.wolfram.com/RouletteAComfortableRideOnAnNGonBicycle/Iso-Optic Curve of a Regular Polygonhttp://demonstrations.wolfram.com/IsoOpticCurveOfARegularPolygon/]]>http://demonstrations.wolfram.com/IsoOpticCurveOfARegularPolygon/Albrecht Dürer's Nonagon of 1525http://demonstrations.wolfram.com/AlbrechtDurersNonagonOf1525/]]>http://demonstrations.wolfram.com/AlbrechtDurersNonagonOf1525/Albrecht Dürer's Heptagon of 1525http://demonstrations.wolfram.com/AlbrechtDurersHeptagonOf1525/]]>http://demonstrations.wolfram.com/AlbrechtDurersHeptagonOf1525/Plato's Shadow Problemhttp://demonstrations.wolfram.com/PlatosShadowProblem/]]>http://demonstrations.wolfram.com/PlatosShadowProblem/Irreptileshttp://demonstrations.wolfram.com/Irreptiles/]]>http://demonstrations.wolfram.com/Irreptiles/Center of Mass of a Polygonhttp://demonstrations.wolfram.com/CenterOfMassOfAPolygon/]]>http://demonstrations.wolfram.com/CenterOfMassOfAPolygon/A Test for the Convexity of a Quadrilateralhttp://demonstrations.wolfram.com/ATestForTheConvexityOfAQuadrilateral/]]>http://demonstrations.wolfram.com/ATestForTheConvexityOfAQuadrilateral/Reflecting a Regular Polygon across Its Sides in the Hyperbolic Planehttp://demonstrations.wolfram.com/ReflectingARegularPolygonAcrossItsSidesInTheHyperbolicPlane/]]>http://demonstrations.wolfram.com/ReflectingARegularPolygonAcrossItsSidesInTheHyperbolicPlane/Dividing Circles, Rectangles, and Triangles into Equal Pieceshttp://demonstrations.wolfram.com/DividingCirclesRectanglesAndTrianglesIntoEqualPieces/]]>http://demonstrations.wolfram.com/DividingCirclesRectanglesAndTrianglesIntoEqualPieces/Regular Tilingshttp://demonstrations.wolfram.com/RegularTilings/]]>http://demonstrations.wolfram.com/RegularTilings/Tiling the Hyperbolic Plane with Regular Polygonshttp://demonstrations.wolfram.com/TilingTheHyperbolicPlaneWithRegularPolygons/]]>http://demonstrations.wolfram.com/TilingTheHyperbolicPlaneWithRegularPolygons/Folding a Trapezoid into Two Different Rectangleshttp://demonstrations.wolfram.com/FoldingATrapezoidIntoTwoDifferentRectangles/]]>http://demonstrations.wolfram.com/FoldingATrapezoidIntoTwoDifferentRectangles/Map-Coloring the Interior Regions Defined by the Diagonals of a Regular Polygonhttp://demonstrations.wolfram.com/MapColoringTheInteriorRegionsDefinedByTheDiagonalsOfARegular/]]>http://demonstrations.wolfram.com/MapColoringTheInteriorRegionsDefinedByTheDiagonalsOfARegular/The Facilities Location Problemhttp://demonstrations.wolfram.com/TheFacilitiesLocationProblem/]]>http://demonstrations.wolfram.com/TheFacilitiesLocationProblem/