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Author:
陈丽婷
GeoGebra
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撒针估算面积实验
常见四边形是否是双心四边形
第八周作业3
斐波那契螺旋弧线（表格法-可动态调节）
异形操场
Discover Resources
菱形有甚麼特性？
東興那題的圖
Golden Ratio (phi) Collection
滑桿動畫
模拟龟兔画板
Discover Topics
Area
Algebra
Cosine
Special Points
Inequalities