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Author:
dhc987
GeoGebra
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錐體建築師
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
找出對稱軸
兩位數加法
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aaa aaa aaa aaa
數值滑桿
軌跡一︰移動點與一固定點保持固定距離(圓)
平移2
比例中的定值問題(一)
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Vectors
Incircle or Inscribed Circle
Conic Sections
Symmetry
Trigonometry