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三角形的內心軌跡
Author:
lunhsin
GeoGebra
New Resources
GeoGebra笔记功能体验课件
【案例】2013年安徽高考15题
找出對稱軸
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
Discover Resources
Sequence指令練習(包絡線：橢圓)
類正五邊形摺法
直線排列 3
等腰直角三角形
外心垂心問題
Discover Topics
Ellipse
Upper and Lower Sum or Riemann Sum
Algebra
Arithmetic
Geometry