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Author:
陳隆期
GeoGebra
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双心四边形
龙形曲线-分形龙
活动三：应用性质
龙形曲线-分形龙2
异形操场
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認識時間
二次函數圖形測驗
外心的位置
P6 數學 立體的截面
Copy of fluid mechanics
Discover Topics
Cosine
Division
Means
General Quadrilateral
Quadrilaterals