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三圓相切
Author:
林士浩
GeoGebra
New Resources
兩位數加法
三位數除以一位數（一）
四邊形的特性
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
Discover Resources
Area of triangle using 0.5bs sinA
雙橢
同位角
GGB4
到點與線段距離相等
Discover Topics
Cosine
Addition
Random Variables
Translation
Tangent Line or Tangent