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圓外切及內切
Author:
luke huang
GeoGebra
New Resources
找出對稱軸
三位數除以一位數（一）
兩位數除以一位數（一）
四邉形 (四年級) 教師版
球体的体积推导（优化版）
Discover Resources
小四小數
判斷柱體 7
橢圓軌跡
軌跡方程式-重心軌跡
橢圓
Discover Topics
Geometric Mean
Kite
Linear Functions
Logarithm
Plane Figures or Shapes