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the definition of ellipse
Author:
丁明智
GeoGebra
New Resources
斐波那契螺旋弧线（表格法-可动态调节）
龙形曲线-分形龙2
比較五件物件的重量
平行線的判定
圓的基本性質
Discover Resources
Quiz on Interior & Exterior Angles of Triangles 三角形內角和及外角：測驗
LA 空間中的直線
周界
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星形线-Astroid Curve-with-Envelope Command
Discover Topics
Complex Numbers
Centroid or Barycenter
Piecewise Functions
Probability
Fractions