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the definition of ellipse
Author:
丁明智
GeoGebra
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正方形雪花图案
中华人民共和国国旗
龙形曲线-分形龙2
科赫雪花
异形操场
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數據分析（1）
Properties of a Square
中位线的副本
滑桿4
圆面积和周长展开示意图
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Parametric Curves
Functions
Numbers
Geometric Distribution
Quadratic Functions