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Author:
Chenwei Chen
GeoGebra
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兩組對邊相等的四邊形
画直线等分三角形的面积
三位數除以一位數（一）
三位數除以一位數（二）
GeoGebra笔记功能体验课件
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棋聖加油
等差數列2
從到兩邊等距的點
Angle in the same segment
Copy of 平行四邊形的面積教材一
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Geometry
Sine
Parametric Curves
Natural Numbers
Trigonometric Functions