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銳角三角函數
Author:
1041006 梁定橋
GeoGebra
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画直线等分三角形的面积
四邊形的特性
四邉形 (四年級) 教師版
畫出對稱圖形
三位數除以一位數（一）
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sum of interior angle
Ex5C#2
弧長與圓心角成比例
分數比較
橢圓軌跡
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Mathematics
Inequalities
Geometric Mean
Percentages
Linear Equations