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二面角
Author:
qianqianhouhou
二面角的概念，拖动A、E点改变半平面
GeoGebra
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【案例】2013年安徽高考15题
找出對稱軸
GeoGebra笔记功能体验课件
球体的体积推导（优化版）
判斷球體
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題一
Is this a prism 7
正四面體
正多边形构造
正立方體展開圖
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Percentages
Median Value
Constructions
Normal Distribution
Complex Numbers