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KochWithTool
Author:
Peng-Jen Lai 賴鵬仁
GeoGebra
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属于与不属于
圆周上的动点形成椭圆
初中数学教材配套资源【人教】
两个等腰三角形
GeoGebra数学资源（4-8年级）
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parallelogram
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Projection01
畫圓周範例檔
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Linear Equations
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