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proof*5 張華炘
Author:
郭亮偉
GeoGebra
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【案例】2013年安徽高考15题
異分母分數減法
画直线等分三角形的面积
三位數除以一位數（二）
找出對稱軸
Discover Resources
waaachen
整數加減向量示意
Distributive Law 1 (分配率 1)
Net of circular cone
頂點法
Discover Topics
Vectors 2D (Two-Dimensional)
Polygons
Scatter Plot
Tangent Line or Tangent
Expected Value