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平行四邊形教材
Author:
蔡敏蓁
GeoGebra
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盈利與虧蝕
百分數及其應用
异形操场
撒针估算面积实验
常见四边形是否是双心四边形
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八年级数学竞赛之比例线段
圖二
正多角錐(簡易)
偏心的農夫?
勾股树的副本
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Rhombus
Tangent Function
Dilation
Scalene Triangles
Area