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Author:
Big Lee
GeoGebra
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龙形曲线-分形龙
正方形雪花图案
直線的斜率：水平變化 & 鉛垂變化
圓的切線方程
中华人民共和国国旗
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輪盤輪盤
onemove
百變火柴
National_Flag
鉛筆畫圓
Discover Topics
Statistics
Sine
Quadratic Functions
Logic
Equilateral Triangles