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正三角形的旋轉
Author:
李春培
正三角形的旋轉
GeoGebra
New Resources
平行線的斜率
画直线等分三角形的面积
三位數除以一位數（一）
兩位數除以一位數（二）
異分母分數減法
Discover Resources
弦中點的軌跡
DSE Circle-ACT01C Distance between Chords and Centre of a Circle
顶顶顶顶顶顶顶顶顶顶
中國火柴遊戲一
直方圖_Demo的副本
Discover Topics
Statistics
Geometric Transformations
Reflection
Upper and Lower Sum or Riemann Sum
Centroid or Barycenter