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6-手拉手全等模型（旋转变换）
Author:
龚洪萍
GeoGebra
New Resources
画直线等分三角形的面积
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
畫出對稱圖形
球體建築師
Discover Resources
正方形的旋轉
T3 Geobra
拋物線
台球反射
微元法演示
Discover Topics
Angles
Upper and Lower Sum or Riemann Sum
Arithmetic
Rational Numbers
Quadratic Functions