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陳兪宏
艾董幾何題
GeoGebra
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球體建築師
柱體建築師
直角坐標平面上的旋轉變換
兩位數加法
算柱 (兩位數)
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了解圓方程(0)
正四面體、正六面體、正八面體
旋轉的概念
梯形
立體圖形
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Symmetry
Quadrilaterals
Diagrams
Integral Calculus
Cylinder