GeoGebra
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Sphere[O, r]
Author:
chen mingchuan
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勾股定理的毕氏证明
[科
test
展開圓面積 (講義版)的副本
平面截正方体
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蝴蝶線ggb
軌道
test1
Geogebra (one tile)
分数
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Scalene Triangles
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Logarithmic Functions