We begin our study of advanced Euclidean geometry by looking at several points associated with a triangle. These points are all called*triangle centers*because each of them can claim to be at the center of the triangle in a certain sense. They are*classical*in that they were known to the ancient Greeks. The classical triangle centers form a bridge between elementary and advanced Euclidean geometry. They also provide an excellent setting in which to develop proficiency with GeoGebra.

While the three classical triangle centers were known to the ancient Greeks, the ancients missed a simple relationship between them.

EP - 30 ET - 1 PB - Mathematical Association of America PY - 2013 SN - 9780883857847 SP - 23 T2 - Exploring Advanced Euclidean Geometry with GeoGebra UR - http://www.jstor.org/stable/10.4169/j.ctt5hh9ht.6 Y2 - 2021/09/28/ ER -