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等边三角形旋转
Author:
宋晓燕
GeoGebra
New Resources
比較五件物件的重量
异形操场
斐波那契螺旋弧线（表格法）
第八周作业3
中华人民共和国国旗
Discover Resources
平方差
管路流量分析
進步公式
Pyth2LK
there phase Vector
Discover Topics
Upper and Lower Sum or Riemann Sum
Cosine
Sphere
Plane Figures or Shapes
Vectors 2D (Two-Dimensional)