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大十字
Author:
陳柄何
GeoGebra
New Resources
正方形雪花图案
圓的基本性質
撒针估算面积实验
盈利與虧蝕
中华人民共和国国旗
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基測試題旋轉
分數加減
hint
齒輪作圖
表内除法
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Triangles
Mathematics
Piecewise Functions
Solids or 3D Shapes
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