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Author:
辛贺华
GeoGebra
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撒针估算面积实验
斐波那契螺旋弧线（表格法）
常见四边形是否是双心四边形
双心四边形
科氏力 (Coriolis Force)
Discover Resources
我的第一個GGB動畫
雙搖桿
內輪差...
y=sinx+1,y=2sinx,y=sin2x的圖形
Learn01
Discover Topics
Orthocenter
Differential Equation
Linear Programming or Linear Optimization
Quadratic Equations
Combinatorics