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Author:
Tse Sir
GeoGebra
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兩組對邊相等的四邊形
第八周作业
三位數除以一位數（一）
錐體建築師
畫出對稱圖形
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海龍公式與內切圓半徑
Life Examples of Quadratic Functions 生活中的二次函數
橢圓的定義
平移法（一）
Copy of 二次函數圖形
Discover Topics
Natural Numbers
Derivative
Real Numbers
Multiplication
Rectangle