# Welcome to Wolfram Mathematica and GoGeometry Index.

 Wolfram Mathematica and GoGeometry - Index Proposed Problem 80. Area of a triangle, side, incircle, inradius. "The Area of a Triangle inside the Incircle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheAreaOfATriangleInsideTheIncircle/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 66: Triangle, Excircle, Tangents, Geometric Mean. "Tangents to an Excircle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TangentsToAnExcircle/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Triangle: Incircle, Perpendicular, Angle Bisector. Using Tracenpoche Interactive Geometry Software. "An Angle Bisection" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/AnAngleBisection/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 52: Triangle, angles, incircle. "A Congruent Angle inside the Incircle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/ACongruentAngleInsideTheIncircle/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Archimedes: Proposition 2 Semicircle, diameter, tangents, secant line. "A Lemma of Archimedes about a Bisected Segment" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/ALemmaOfArchimedesAboutABisectedSegment/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Archimedes: Proposition 12 Semicircle, Diameter, Chords, Tangents, Perpendicular. "Tangent Points on a Semicircle" from The Wolfram Demonstrations Project" http://demonstrations.wolfram.com/TangentPointsOnASemicircle/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Problem 32. Triangle, Cevian, Incircles, Tangents. "Incircles and a Cevian" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/IncirclesAndACevian/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 98. Quadrilateral Area, Centroid, Similarity. "The Quadrilateral of Centroids" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheQuadrilateralOfCentroids/ Contributed by: Jay Warendorff  After work by: Antonio Gutierrez Archimedes: Proposition 13 Circle, Diameter, Chord, Perpendicular, Congruence. "Perpendiculars to a Chord" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/PerpendicularsToAChord/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Archimedes Proposition 1. Tangent circles and parallel diameters "Tangent Circles and Parallel Diameters" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TangentCirclesAndParallelDiameters/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 160. Triangle, Incircle, Incenter, Circumcircle, Circumcenter, Inradius. "The Line through the Incenter and Circumcenter" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheLineThroughTheIncenterAndCircumcenter/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 159. Distances from the Circumcenter to the Incenter and the Excenters. "The Distances to the Incenter and Excenters from the Circumcenter" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheDistancesToTheIncenterAndExcenters Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 157. Distance from the Circumcenter to the Excenter. "The Distance from the Circumcenter to an Excenter" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheDistanceFromTheCircumcenterToAnExcenter/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 156. Triangle, Circumradius, Exradius, Chord, Secant line. "The Product of the Circumradius and an Exradius" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheProductOfTheCircumradiusAndAnExradius/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 118. Area of triangle, incenter, excenter, tangent. "Another Relation between the Areas of Triangles Associated with an Excircle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/AnotherRelationBetweenTheAreasOfTriangles Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 119. Area of triangle, incenter, excircle, tangent. "On the Areas of Triangles Associated with an Excircle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/OnTheAreasOfTrianglesAssociatedWithAnExcircle/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Trapezoid, Triangle, Diagonals, Midpoints. Using Tracenpoche Interactive Geometry Software. "Two Midpoints of a Trapezoid" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TwoMidpointsOfATrapezoid/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 136. Orthic Triangle, Altitudes, Perpendicular, Concyclic Points. "Three Concyclic Sets of Points Associated with the Orthic Triangle" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/ThreeConcyclicSetsOfPoints Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 143. Four Triangles, Incircle, Tangent and Parallel to Side, Circumradii. "The Sum of the Circumradii of Three Subtriangles" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheSumOfTheCircumradiiOfThreeSubtriangles/ Contributed by: Jay Warendorff After work by: Antonio Gutierrez Proposed Problem 142. Four Triangles, Incircle, Tangent and Parallel to Side, Areas. "The Sum of the Square Roots of the Areas of Three Subtriangles" from The Wolfram Demonstrations Project: http://demonstrations.wolfram.com/TheSumOfTheSquareRootsOfTheAreas Contributed by: Jay Warendorff After work by: Antonio Gutierrez Generating Lissajous Figures with Wolfram Mathematica. Video and News

 Home | Go Geometry Education | Search | Geometry | Wolfram | Email | Post a comment