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中間人
Author:
keihin
GeoGebra
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画直线等分三角形的面积
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
找出對稱軸
三位數除以一位數（一）
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判斷柱體 4
Copy of 七巧板
ghseh 二次函數描點法左右平移-2
Activity 3
素因数分解 Prime Factorization
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Ellipse
Standard Deviation
Derivative
Definite Integral
Volume