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四則混合
Author:
周錦鋒
GeoGebra
New Resources
双心四边形
第八周作业1
常见四边形是否是双心四边形
撒针估算面积实验
球体的截面
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Jiawen Yun
工作紙題3
周界平移
青字歌
底数,指数,幂的函数关系
Discover Topics
Incircle or Inscribed Circle
Centroid or Barycenter
Vectors
Fractions
Planes