Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsOrchard-Planting Problemhttp://demonstrations.wolfram.com/OrchardPlantingProblem/]]>http://demonstrations.wolfram.com/OrchardPlantingProblem/Reference Angleshttp://demonstrations.wolfram.com/ReferenceAngles/]]>http://demonstrations.wolfram.com/ReferenceAngles/A Line Crossing Two Parallel Lines Makes Alternate Angles Equalhttp://demonstrations.wolfram.com/ALineCrossingTwoParallelLinesMakesAlternateAnglesEqual/]]>http://demonstrations.wolfram.com/ALineCrossingTwoParallelLinesMakesAlternateAnglesEqual/Segment Intersectionhttp://demonstrations.wolfram.com/SegmentIntersection/]]>http://demonstrations.wolfram.com/SegmentIntersection/Cartesian Coordinates Exercisehttp://demonstrations.wolfram.com/CartesianCoordinatesExercise/]]>http://demonstrations.wolfram.com/CartesianCoordinatesExercise/Angle Measurehttp://demonstrations.wolfram.com/AngleMeasure/]]>http://demonstrations.wolfram.com/AngleMeasure/Triangles: Acute, Right, and Obtusehttp://demonstrations.wolfram.com/TrianglesAcuteRightAndObtuse/]]>http://demonstrations.wolfram.com/TrianglesAcuteRightAndObtuse/Basic Angleshttp://demonstrations.wolfram.com/BasicAngles/]]>http://demonstrations.wolfram.com/BasicAngles/Types of Angleshttp://demonstrations.wolfram.com/TypesOfAngles/]]>http://demonstrations.wolfram.com/TypesOfAngles/