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元旦快乐（制作：孟宝兴）
Author:
孟宝兴
GeoGebra
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GeoGebra笔记功能体验课件
兩位數加法
画直线等分三角形的面积
柱體建築師
判斷球體
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平移旋轉對稱
test2
Copy of 周界
圓周公式應用題2的副本
圆的有关概念
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Rectangle
Circle
Special Points
Trapezoid
Definite Integral