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正四面體交角
Author:
lamanleung
GeoGebra
New Resources
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）
兩位數除以一位數（一）
找出對稱軸
Discover Resources
兩位數除法
畢氏定理
圓系
Net1- AB+AD+AE
凸透镜成像
Discover Topics
LCM and GCD
Area
Statistical Characteristics
Random Experiments
Terms