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多邊形面積(新一代第三版 EX22#8)
Author:
lkkbmaths teachers 檔案儲存用
GeoGebra
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判斷球體
錐體建築師
算柱 (兩位數)
三位數除以一位數（一）
四邉形 (四年級) 教師版
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用兩圓編織美麗的曲面
「相似三角形」任务2
Opp angles cyclic quad
Copy of 平行四邊形的面積
圓周_心算題03
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Expected Value
Sequences and Series
Isosceles Triangles
Diagrams
Straight Lines