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拋物線
Author:
Aleck Chang
GeoGebra
New Resources
撒针估算面积实验
折扣
第三周作业效果演示
百分數及其應用
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
多邊形上的自由動點
畢氏定理完成20170330final
畢氏定理2
Newton's method
斜率乘积为定值（椭圆、双曲线）
Discover Topics
Centroid or Barycenter
Geometric Transformations
Function Graph
Inequalities
Rotation