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Author:
Henry Leung
GeoGebra
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科赫雪花
第八周作业1
斐波那契螺旋弧线（表格法-可动态调节）
双心四边形
常见四边形是否是双心四边形
Discover Resources
corry v2
阿基米德螺線
Copy of 分數比較
三角形的构成的副本
任意凸多边形的滚动
Discover Topics
Probability
Trapezoid
Straight Lines
Geometric Transformations
Sequences and Series