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Author:
婉鈴 吳
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GeoGebra Institute of Hong Kong
GeoGebra
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兩組對邊相等的四邊形
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正餘弦函數的疊合之二102.11.29
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優良作品4(昀潔)
Sonia and Julie
我的第一个绘本
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Cone
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Right Triangles
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