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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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sanjiaohanshu
四邉形 (四年級) 教師版
算柱 (兩位數)
畫出對稱圖形
兩位數除以一位數(二)
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七巧板
角平分線
Locus (Non parallel lines)
拋物線1--焦點法
三角形的构成的副本
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Parametric Curves
Translation
Pyramid
Intersection
Square