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tan90
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tan90
GeoGebra
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球体的体积推导(优化版)
兩位數除以一位數(二)
【案例】2018年全国1卷理科12题
判斷球體
【案例】2013年安徽高考15题
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八年级数学竞赛之比例线段
加減併式與估算
Copy of 以剪貼比較圖形大小 題1
劉徽的「割圓術」的副本
翰林數學_2下_CH3-1_點線角
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Means
Tangent Function
Similar Triangles
Variance
Linear Programming or Linear Optimization