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[洋葱] 平行相似(0717)：找相似三角形
Author:
acchu
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
圓的切線方程
漂亮的摇摆曲线
垂直線的斜率
兩位數除以一位數（二）
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一點點小範例
任意兩正方形切割重組成一大正方形之動態證明
五位數
折纸—直三棱锥
七巧板（tangram）的副本
Discover Topics
Sequences and Series
Boxplot
Fractal Geometry
Vectors
Interest Calculation