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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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直角坐標平面上的旋轉變換
柱體建築師
兩位數除以一位數（一）
判斷球體
畫出對稱圖形
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祖恒原理
橢圓軌跡
Locus: Equidistance From Two Parallel Lines
天佑數學三下B - 分數(二)
繡曲線01
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Combinatorics
Exponential Functions
Mode
Vectors
General Quadrilateral