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詠甯
GeoGebra
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兩位數加法
柱體建築師
第八周作业
四邊形的特性
兩組對邊相等的四邊形
Discover Resources
估算分數對應的百分數
證平行四邊形 (對角相等)
正n凸多邊形旋轉對稱/反射對稱
mathmedia_40204
中国纸质灯笼
Discover Topics
Real Numbers
Cube
Solids or 3D Shapes
Continuity
Surface