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碎形
Author:
chen mingchuan
GeoGebra
New Resources
活动三:应用性质
平行線的判定
撒针估算面积实验
三角函数 的副本
第八周作业2
Discover Resources
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圓周 (圖形E)
正角柱體
串珠(大小不同)
百度
Discover Topics
Functions
Cosine
Straight Lines
Fractal Geometry
Trigonometry