Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsTriangle Calculatorhttp://demonstrations.wolfram.com/TriangleCalculator/]]>http://demonstrations.wolfram.com/TriangleCalculator/Problems on Circles IX: Circumcircles and Incircles of a Trianglehttp://demonstrations.wolfram.com/ProblemsOnCirclesIXCircumcirclesAndIncirclesOfATriangle/]]>http://demonstrations.wolfram.com/ProblemsOnCirclesIXCircumcirclesAndIncirclesOfATriangle/Euclid, Book 3, Proposition 22http://demonstrations.wolfram.com/EuclidBook3Proposition22/]]>http://demonstrations.wolfram.com/EuclidBook3Proposition22/Circumcenter of a Trianglehttp://demonstrations.wolfram.com/CircumcenterOfATriangle/]]>http://demonstrations.wolfram.com/CircumcenterOfATriangle/Inscribing Four Circles in a Trianglehttp://demonstrations.wolfram.com/InscribingFourCirclesInATriangle/]]>http://demonstrations.wolfram.com/InscribingFourCirclesInATriangle/Pairwise Tangent Circles Centered at the Vertices of a Trianglehttp://demonstrations.wolfram.com/PairwiseTangentCirclesCenteredAtTheVerticesOfATriangle/]]>http://demonstrations.wolfram.com/PairwiseTangentCirclesCenteredAtTheVerticesOfATriangle/The Bomb Problemhttp://demonstrations.wolfram.com/TheBombProblem/]]>http://demonstrations.wolfram.com/TheBombProblem/Johnson's Theoremhttp://demonstrations.wolfram.com/JohnsonsTheorem/]]>http://demonstrations.wolfram.com/JohnsonsTheorem/Circumcircle and Incircle of a Trianglehttp://demonstrations.wolfram.com/CircumcircleAndIncircleOfATriangle/]]>http://demonstrations.wolfram.com/CircumcircleAndIncircleOfATriangle/Concyclic Pointshttp://demonstrations.wolfram.com/ConcyclicPoints/]]>http://demonstrations.wolfram.com/ConcyclicPoints/