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選擇合適的「中間人」
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
GeoGebra
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兩位數加法
四邉形 (四年級) 教師版
畫出對稱圖形
錐體建築師
兩位數除以一位數（一）
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Geometric Circle
GeoGebra圖檔上傳
graph of y=-f(-(x-1))
三角形的面積的副本
数一数这是几边形
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Rectangle
Integers
Root
Kite
Triangles