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园
Author:
石京
GeoGebra
New Resources
正方形雪花图案
撒针估算面积实验
斐波那契螺旋弧线（表格法-可动态调节）
比較五件物件的重量
三角函数 的副本
Discover Resources
lim sin(x)/x = 1
翰林B4講p189_8
Copy of 軸對稱
含参的分段函数的单调性问题
诱导公式六（90°-α）
Discover Topics
Vectors 2D (Two-Dimensional)
Arithmetic
General Quadrilateral
Orthocenter
Vectors 3D (Three-Dimensional)