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the definition of ellipse
Author:
丁明智
GeoGebra
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斐波那契螺旋弧线（表格法）
异形操场
盈利與虧蝕
斐波那契螺旋弧线（表格法-可动态调节）
正方形雪花图案
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Mean of a Large Set of Data 大量數據的平均數
f-10-2-poly3-gph-bac-2&3
ggb7黃金螺線
vit3301
龜甲
Discover Topics
Curve Sketching
Statistical Characteristics
Triangles
Constructions
Incircle or Inscribed Circle