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ie 7
Author:
LAM YU SANG
GeoGebra
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三位數除以一位數（一）
垂直線的斜率
兩位數加法
圓周公式的應用
球体的体积推导（优化版）
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正餘弦函數的疊合102.11.27
賴桑_等差數列與級數_兩數列之比例
哈里斯螺旋 - 框線版 (Harriss Spiral)
Copy of 圓周公式應用題1
和直线和圆同时相切的圆
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Centroid or Barycenter
Logic
Inequalities
Logarithmic Functions
Quadrilaterals