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保持2:3:4
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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【案例】2013年安徽高考15题
找出對稱軸
兩位數除以一位數（二）
異分母分數減法
兩位數加法
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Jiawen Yun
perd fr ctr bisect
旋轉對稱 Rotational symmetry
圆在直线上滚动
S408 Penrose 階梯
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Logarithm
Confidence Interval
Division
Cube
Fractal Geometry