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3sin2t
Author:
Sin Min
GeoGebra
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比較五件物件的重量
盈利與虧蝕
科赫雪花
斐波那契螺旋弧线（表格法-可动态调节）
平行線的判定
Discover Resources
Clock24hour
軌跡,摺紙,滾動,實驗觀察,曲線
deductive geometry
(007)80102
蝴蝶定理动态演示
Discover Topics
Inequalities
Cube
Prism
Circumcircle or Circumscribed Circle
Numbers