Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsMixtilinear Incircleshttp://demonstrations.wolfram.com/MixtilinearIncircles/]]>http://demonstrations.wolfram.com/MixtilinearIncircles/A Concurrency of Lines through Points of Tangency with Excircleshttp://demonstrations.wolfram.com/AConcurrencyOfLinesThroughPointsOfTangencyWithExcircles/]]>http://demonstrations.wolfram.com/AConcurrencyOfLinesThroughPointsOfTangencyWithExcircles/The Second Lemoine Circlehttp://demonstrations.wolfram.com/TheSecondLemoineCircle/]]>http://demonstrations.wolfram.com/TheSecondLemoineCircle/Lines Parallel to the Sides of a Trianglehttp://demonstrations.wolfram.com/LinesParallelToTheSidesOfATriangle/]]>http://demonstrations.wolfram.com/LinesParallelToTheSidesOfATriangle/