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Author:
johnmayhk
GeoGebra
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【案例】2013年安徽高考15题
垂直線的斜率
探究三角形的全等條件
漂亮的摇摆曲线
【案例】圆柱体内放置一个大球六个小球
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滾動圓周來發現圓周長
dse13
y=sinx对称中心
比較數量-1
包含除法（1 ÷分數）的副本
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Scalene Triangles
Special Points
Triangles
Combinatorics
Fractal Geometry