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戴德林球
Author:
冯伟冀
Topic:
Conic Sections
GeoGebra
New Resources
兩位數加法
三位數除以一位數（一）
異分母分數減法
球体的体积推导
【案例】圆柱体内放置一个大球六个小球
Discover Resources
日本國旗
三角函數的由來
黃金矩形與複數級數
勾股定理III 基於歐基里德(Euclid)的證明
掷色子
Discover Topics
Multiplication
Unit Circle
Circumcircle or Circumscribed Circle
Isosceles Triangles
Hyperbola