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同心圓和線段-3(線段到最外圓有小圓)
Author:
jessice
GeoGebra
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兩組對邊相等和有直角的四邊形
球體建築師
畫出對稱圖形
兩組對邊相等的四邊形
三位數除以一位數（二）
Discover Resources
有趣
doto属性研究
semicircle
橢圓的定義
橢圓軌跡02
Discover Topics
Quadratic Equations
Incircle or Inscribed Circle
Continuity
Power Functions
Geometric Transformations