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特製的門 2
Author:
李春培
特製的門2
https://www.facebook.com/video.php?v=730160733696759&fref=nf
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
球體建築師
異分母分數減法
三位數除以一位數（一）
Discover Resources
Rotational Symmetry
直方圖_Demo
Similar triangles inscribed iteration400
眼睛的毛病(近視及遠視)
正方体与球面的相交曲面
Discover Topics
Standard Deviation
Constructions
Mode
Rectangle
Reflection