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兩圓內外公切線
Author:
梅
GeoGebra
New Resources
錐體建築師
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
球体的体积推导（优化版）
Discover Resources
Addition of 2 Directed Numbers
蝴蝶定理證明2：綜合法
大無限圖
IMO2015C
分段控制
Discover Topics
Incircle or Inscribed Circle
Distributions
Cosine
Vectors 3D (Three-Dimensional)
Mode