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求公切線段長
Author:
Gideon Huang
GeoGebra
New Resources
球體建築師
兩位數加法
三位數除以一位數（一）
GeoGebra笔记功能体验课件
球体的体积推导（优化版）
Discover Resources
正弦定理的验证
量角器2
餘弦公式2
碎形
紙張的長與闊
Discover Topics
Cylinder
Perimeter
Cuboid
Tangent Line or Tangent
Division