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銀杏葉
Author:
連琨銘
GeoGebra
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四邊形的特性
柱體建築師
直角坐標平面上的旋轉變換
近似值：有效數字
【案例】2018年全国1卷理科12题
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this is math pic
橢圓螺旋
圓與三角形中點的軌跡
GGB 教程
加法001(结果10以内)
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Quadratic Functions
Equilateral Triangles
Percentages
Constructions
Sine