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illusion
Author:
杨桃李@
GeoGebra
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双心四边形
祖冲之的期望：内棋与外棋
常见四边形是否是双心四边形
盈利與虧蝕
折扣
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Copy of 齊來製作對稱圖
二次涵数的图象y=ax^2+b的副本
切線斜率的副本
活工(二)Q4
指数函数的副本
Discover Topics
Optimization Problems
Rotation
Mathematics
Natural Numbers
Normal Distribution