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同心圓+等分割線
Author:
許清惟
GeoGebra
New Resources
錐體建築師
拼砌四邊形
判斷球體
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
Discover Resources
立方體與平面截痕１
立體線圈
小圓外繞大圓
探讨二次多项式的参数和图型
Find your perfect rectangle
Discover Topics
Ellipse
Histogram
Curve Sketching
Line Segment
Dilation