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聖誕樹螺線
Author:
李冠邑
GeoGebra
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第八周作业
龙形曲线-分形龙
平行線的判定
中华人民共和国国旗
正方形雪花图案
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clock
quadrilaterals 4
Quiz on Projection of a Line Segment on a Plane 投影：測驗
試算表應用
Copy of 賺賠：例1
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Vectors
Matrices
Hyperbola
Statistics
Equations