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quadrilaterals 5
Author:
iedc
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球体的体积推导(优化版)
判斷球體
兩位數加法
拼砌四邊形
Discover Resources
縫衣針
镂空菱形六十面体
少了一個質數One less prime number
微元法演示
刘校安排(1)
Discover Topics
Rotation
Cylinder
Square
Variance
Geometry