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三角四星
Author:
吳秉沂
GeoGebra
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【案例】2018年全国1卷理科12题
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
兩位數加法
兩位數除以一位數（二）
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乘法運算
Copy of 固定周界的長方形的面積變化
Directed numbers
Remove a data
不等式
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Addition
Rotation
Parallelogram
Arithmetic
Indefinite Integral