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Author:
rubylee0913
GeoGebra
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龙形曲线-分形龙
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
中华人民共和国国旗
撒针估算面积实验
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vector addition and subtraction
Homework6
青字歌
Copy of 圓周公式應用題2
拋物線五-包絡線法
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Equilateral Triangles
Rectangle
Symmetry
Parabola
Reflection