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funny draw
Author:
dunst kang
GeoGebra
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探究三角形的全等條件
垂直線的斜率
圓周公式的應用
圓的基本性質
空间中两直线的位置关系
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K9@cn
數學操作課程_20150920
三角函數值 (特別角)
紙張的長與闊
分割多边形
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Area
Hypothesis Testing
Fractions
Square
Combinatorics