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圓柱截痕
Author:
陳基正
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
畫出對稱圖形
三位數除以一位數（二）
異分母分數減法
兩位數除以一位數（二）
Discover Resources
封閉區域著色
一元二次方程式-應用問題(兩圓相切-2)
Copy of Fill a special area
乘加挑戰題
Protractor-usage
Discover Topics
Angles
Fractal Geometry
Derivative
Exponential Functions
Circumcircle or Circumscribed Circle