- Modern Geometry of the TriangleCevians and the Cevian TriangleCollinearities and Concurrencies: Sides of Cevian Triangle.External CeviansPerspective Triangles: A 3D ViewExternal Cevians and the Precevian TriangleCenters Associated With The IncenterPedal TrianglesThe ExtraGergonne TrianglePivot TriangleThe Nagel LineIsogonal Conjugates and the IncenterPedal Points of Isogonal Conjugates are ConcyclicPerpendiculars to the Pedal TriangleIsotomic ConjugatesSteiner Circumellipse as Isotomic ConjugateGergonne and Nagel and Isotomic ConjugatesPedal Triangles of Isogonal ConjugatesAntiparallel, Medians, and SymmediansThe Lemoine AxisThe Brocard AxisThe Orthic AxisThe First Brocard PointThe Brocard Points are Isogonal ConjugatesThe Brocard TriangleThe Brocard Triangle and Brocard CircleParallels to the Brocard TrianglePerpendiculars to the Brocard Triangle (Tarry Point)
Modern Geometry of the Triangle
- Author:
- Steve Phelps
- Topic:
- Geometry
This GeoGebraBook is inspired by the work of the same name by the late Triangle Geometer Steve Sigur
