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正n凸多邊形旋轉對稱／反射對稱
Author:
lamanleung
GeoGebra
New Resources
百分數及其應用
龙形曲线-分形龙
折扣
撒针估算面积实验
科赫雪花
Discover Resources
World's Second-Hardest Easy Geometry Problem
蝴蝶公式
柯西不等式
線性變換矩陣（二階）的副本
二次函数图像的性质探究
Discover Topics
Circumcircle or Circumscribed Circle
Congruence
Multiplication
Logarithmic Functions
Subtraction