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GeoGebra
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SIN繪圖
Author:
林鴻鈞
GeoGebra
New Resources
畫出對稱圖形
Fibonacci Clock
sanjiaohanshu
找出對稱軸
Earth with coastline
Discover Resources
形心
給三角形求正三角形
Section Curves
拋物線上的弓形區域
勒洛四面体（参数曲面法）
Discover Topics
Rhombus
Inequalities
Matrices
Addition
Circumcircle or Circumscribed Circle