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GeoGebra
GeoGebra Classroom
GeoGebra
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Author:
Songlang
GeoGebra
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科赫雪花
正方形雪花图案
平行線的判定
三角函数 的副本
双心四边形
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soccer(final)
橫向橢圓
十分逼近法
重心
Fraction(2)
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Diagrams
Curve Sketching
Cosine
Isosceles Triangles
Limits