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Author:
李春培
GeoGebra
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找出對稱軸
画直线等分三角形的面积
兩組對邊相等的四邊形
球体的体积推导(优化版)
三位數除以一位數(一)
Discover Resources
終點軌跡
trigonometry3
夜市麻將模擬機2
test
繪畫正方形
Discover Topics
Natural Numbers
Symmetry
Integers
Derivative
Centroid or Barycenter