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小船过河问题
Author:
李大地(Field Lee)
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
異分母分數減法
拼砌四邊形
画直线等分三角形的面积
Discover Resources
龍騰4_1-1講進5
數字鐘
分割
cube(方块堆叠)
三角形综合题
Discover Topics
Incircle or Inscribed Circle
Matrices
Special Points
Correlation
Ratios