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Author:
马云辉
GeoGebra
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兩位數加法
錐體建築師
畫出對稱圖形
兩組對邊相等的四邊形
拼砌四邊形
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電子幾何條
winter vacation homework 6
積分的副本
雙曲線1-焦點法
平行四邊形面積的副本
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Arithmetic Operations
Coordinates
Geometric Transformations
Sequences and Series
Solids or 3D Shapes