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P18第22题
Author:
袁正铎
GeoGebra
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【案例】2013年安徽高考15题
畫出對稱圖形
三位數除以一位數（二）
四邊形的特性
GeoGebra笔记功能体验课件
Discover Resources
以量角器量度角
線對稱圖形練習2
Constructing Quadrilaterals by Four Sides (2014)
Congruent Triangles Demo
Ex5C#14
Discover Topics
Random Variables
Hypothesis Testing
Coordinates
Parametric Curves
Secant Line or Secant