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三角形的外角和
Author:
Gideon Huang
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全等—正方形的旋转
酷狗音乐
二次函數一般式
圆形料场下降深度计算1817
滾動球
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YIPPUIMEIgeogebra
GGB1
鐘面、數字鐘、報時互換
黃金三角形
Oxyz
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Volume
Similarity Transformation or Similarity
Triangles
Reflection
Surface
