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正方形的旋轉2
Author:
李春培
正方形的旋轉2
GeoGebra
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【案例】2018年全国1卷理科12题
画直线等分三角形的面积
柱體建築師
判斷球體
拼砌四邊形
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圓錐曲線軌跡 (1)
圓周率圓周率
銳角三角：tan
內心
动态展开圆柱体
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Cube
Solids or 3D Shapes
Coordinates
Percentages
Congruence