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四則混合
Author:
周錦鋒
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等的四邊形
球体的体积推导
画直线等分三角形的面积
球体的体积推导（优化版）
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立方和
四邊形四個西姆松圓交於九點心
兩點長度
Problem1:(md+me+mf)/(ad+be+cf)=a
平行線的斜率
Discover Topics
Function Graph
Circumcircle or Circumscribed Circle
Indefinite Integral
Rational Numbers
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