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三角形內心
Author:
Chang Hui Fang
GeoGebra
New Resources
GeoGebra笔记功能体验课件
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
球体的体积推导（优化版）
第八周作业
Discover Resources
利用按鈕控制動畫On/Off
第一冊
斯坦納-雷米歐司(Steiner-Lehmus)定理推廣
Simultaneous Equations (Linear and quadratic)
GeoGebra创建的小游戏集
Discover Topics
Rectangle
Special Points
Rational Numbers
Scalene Triangles
Algebra