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Author:
chen mingchuan
GeoGebra
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兩位數除以一位數（二）
畫出對稱圖形
三位數除以一位數（二）
算柱 (兩位數)
画直线等分三角形的面积
Discover Resources
Proof of Pythagoras Theorem(1) 畢氏定理的証明(1)
指數函數的圖像
象限
可控坐标系
以 Unit Circle 了解 Sine 的正/負的副本
Discover Topics
Centroid or Barycenter
Plane Figures or Shapes
Equations
Pythagoras or Pythagorean Theorem
Orthocenter