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Author:
srj
GeoGebra
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百分數及其應用
盈利與虧蝕
异形操场
比較五件物件的重量
小学资源收集
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正立方體內皂膜
glt-c05-03 正五角錐旋轉
Angle between a Line and a Plane
滾動的圓
鉛筆畫圓
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Matrices
Cone
Trigonometry
Perimeter
Function Graph