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多边形对角线
Author:
张英华
GeoGebra
New Resources
直角坐標平面上的旋轉變換
柱體建築師
拼砌四邊形
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
把手(環面)
S5 Locus
언제부터인지 몰르겟는데 ..
黃金螺線62326 劉虹圻
射线上滚动椭圆
Discover Topics
Incircle or Inscribed Circle
Arithmetic Mean
Ellipse
Histogram
Quadrilaterals