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形心计算
Author:
阳光
Topic:
Centroid or Barycenter
GeoGebra
New Resources
漂亮的摇摆曲线
第八周作业
画直线等分三角形的面积
探究三角形的全等條件
三位數除以一位數（一）
Discover Resources
直線與圓的位置關係
方向餘弦
鑲嵌圖形-1
九九乘法表的認識
蜘蛛網
Discover Topics
Histogram
Set Theory
Rotation
Natural Numbers
Subtraction