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Author:
chen mingchuan
GeoGebra
New Resources
画直线等分三角形的面积
找出對稱軸
畫出對稱圖形
三位數除以一位數（一）
異分母分數減法
Discover Resources
弦的定理
倒數計時
GeoGebraBook(for20151202)
三角形周長
橢圓軌跡 (4)的副本
Discover Topics
Arithmetic
Incircle or Inscribed Circle
Trigonometric Functions
Linear Equations
Curve Sketching