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gjh-g04-00 差的平方公式
Author:
均一
GeoGebra
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兩位數加法
畫出對稱圖形
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
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根號n的做圖法之二
最小周長
畢氏定理(面積平移)
Copy of mearm機械手臂模擬
仿真时钟2.0
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Derivative
Rhombus
Straight Lines
Addition
Diagrams