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正弦定理
Author:
张坤
GeoGebra
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四邉形 (四年級) 教師版
直角坐標平面上的旋轉變換
GeoGebra笔记功能体验课件
畫出對稱圖形
判斷球體
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testdcfdfsdfsd
淮阴2015-28
認識對稱圖形
翻轉方塊(雙開)
比較角的大小一
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Quadrilaterals
Angles
Parallelogram
Square
Line Segment