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Heidi Lin - Conic Section
Author:
heidi1104
GeoGebra
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科赫雪花
正方形雪花图案
平行線的判定
盈利與虧蝕
双心四边形
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ghrtghrtghrtgbr
任意四邊形1比3
用和或差的平方做因式分解
黃金三角形 62326 劉虹圻
椭圆内切圆链
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Correlation
Parametric Curves
Line Segment
Random Variables
Geometry