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七巧板
Author:
geogebra王平
GeoGebra
New Resources
拼砌四邊形
兩位數加法
錐體建築師
三位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
tool for age question
平行1
angle
割补法
六个常见超越函数图像
Discover Topics
Polynomial Functions
Centroid or Barycenter
Rhombus
Histogram
Arithmetic