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平行四邊形教材
Author:
蔡敏蓁
GeoGebra
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正方形雪花图案
科赫雪花
第八周作业1
第八周作业3
异形操场
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探究平行四邊形面積(2)
Drag the red dots, see the area ratio of EHFG to ABCD
橢圓的定義
錯角---不平行綫
等差数列、等比数列
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Geometry
Integers
Square
Vectors
Numbers