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正八面體
Author:
黃國斌
GeoGebra
New Resources
兩位數加法
兩組對邊相等的四邊形
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
球体的体积推导（优化版）
Discover Resources
HW 1
橢圓重心軌跡1
雙曲線與斜率
Copy of 平行四邊形
Illusion-若隐若现的白点
Discover Topics
Stochastic Process or Random Process
Variance
Vectors 3D (Three-Dimensional)
Surface
Special Points