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谢尔宾斯基三角形
Author:
孟宝兴
GeoGebra
New Resources
平行線的斜率
科氏力 (Coriolis Force)
撒针估算面积实验
直線的斜率
探究三角形的全等條件
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parallelgram with height 20120319
Temp
翰林B4課p227_9
圆的面积展开的副本
手拉手模型
Discover Topics
Median Value
Geometry
Angles
Median Line
Rotation