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圓與切線
Author:
34黃安慈
GeoGebra
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異分母分數減法
三位數除以一位數（一）
画直线等分三角形的面积
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
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三视图试卷讲评
七巧板
一元二次方程式-應用問題(兩圓相切-2)
Angle at centre twice angle at circumference
整數乘分數
Discover Topics
Rotation
Numbers
Geometric Mean
Logarithm
Centroid or Barycenter