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保持比例
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
兩位數加法
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方向導數 (Directional Derivative)
國旗動畫
平行線法
畢氏定理 (勾股定理) <Pythagorean theorem>
正十二面體內接正四面體旋轉
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Perimeter
Constructions
Coordinates
Symmetry
Cube