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Author:Jensen Wong

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算柱 (兩位數)
錐體建築師
畫出對稱圖形
兩位數除以一位數（二）
小数的副本

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用 Geogebra 模擬日照、影長變換
分數(二)
拼出三角形的副本
六上：圆的面积公式推导
Circle

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Centroid or Barycenter
Dilation
Cone
Unit Circle
Tangent Function

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