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平行線截等比例
Author:
周桂名
平行線截等比例
GeoGebra
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球体的体积推导
兩組對邊相等的四邊形
畫出對稱圖形
柱體建築師
【案例】2013年安徽高考15题
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equilateral triangle construction
給柱體一個名字 2
重心
sin(x) 的函數圖形的副本
九九乘法表
Discover Topics
Circle
Incircle or Inscribed Circle
Unit Circle
Algebra
Median Line