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垂心與垂線
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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【案例】2013年安徽高考15题
畫出對稱圖形
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
找出對稱軸
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三角錐體的截面
Fractal Spirograph (Fractal Roulette)
角的認識
拼出三角形的副本
数一数这是几边形
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Parametric Curves
Equations
Division
Optimization Problems
Circle