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Author:
Songlang
GeoGebra
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正方形雪花图案
讀磅
直線的斜率
三角函数 的副本
圓的切線方程
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clock
Compound Inequalities(複合不等式)
Copy of 部分佔全部的百分率: 例1
一年級
七巧板
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Geometry
Triangles
Real Numbers
Matrices
Rotation