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鉛筆的長度

Author:GeoGebra Institute of Hong Kong

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判斷球體
畫出對稱圖形
【案例】2013年安徽高考15题
異分母分數減法
三位數除以一位數（一）

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How to draw a hexagon with ruler and compasses?
二次函數的圖像：頂點式
周界(移邊)
正餘弦函數的疊合
劉徽的「割圓術」的副本

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Rhombus
Upper and Lower Sum or Riemann Sum
Pythagoras or Pythagorean Theorem
Vectors 2D (Two-Dimensional)
Arithmetic Operations

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