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马云辉
GeoGebra
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算柱 (兩位數)
兩組對邊相等的四邊形
異分母分數減法
直角坐標平面上的旋轉變換
找出對稱軸
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面積和體積
數學操作課程_20150920
優良作品8(宜庭)
三角形周長
求公切線段長
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Multiplication
Linear Functions
Cosine
Orthocenter
Statistics