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Author:
李春培
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GeoGebra
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三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
錐體建築師
找出對稱軸
Discover Resources
蝴蝶線ggb
Opening Box
卓蘭高中
橢圓軌跡
三角形面积关于动点行程的函数图像
Discover Topics
Inequalities
Linear Functions
Conic Sections
Arithmetic Mean
Median Line