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求一數是另一數的幾分之幾（比較）
Author:
Tong Wing Hong
GeoGebra
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圓的基本性質
直線的斜率：水平變化 & 鉛垂變化
双心四边形
正方形雪花图案
折扣
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永遠固定大小的圖片
I love you
加法
ghseh 二次函數描點法左右平移-4
Distributive Law of Multiplication 1 (乘法的分配率 1)
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Prism
Dilation
Statistical Characteristics
Coordinates
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