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3-3-12
Author:
Tzuen Hsu
GeoGebra
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算柱 (兩位數)
画直线等分三角形的面积
異分母分數減法
找出對稱軸
四邉形 (四年級) 教師版
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動態畢氏定理
題5
过圆上一点作切线，三步
角平分線性質
榔头和它的展开图
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Limits
Ellipse
Percentages
Functions
Division