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20161029國旗
Author:
susan
GeoGebra
New Resources
圓的切線方程
球体的体积推导
画直线等分三角形的面积
漂亮的摇摆曲线
三角函数 的副本
Discover Resources
Generalized Pythagorean Theorem
齿轮咬合
伊斯蘭窗花
固定周界長方形的面積變化（一）
Copy of sine graph 變換
Discover Topics
Scalene Triangles
General Quadrilateral
Vectors
Binomial Distribution
Arithmetic