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S0E2
Author:
陈海燕
GeoGebra
New Resources
第八周作业2
常见四边形是否是双心四边形
中华人民共和国国旗
比較五件物件的重量
撒针估算面积实验
Discover Resources
ggb-fs-a1
Centroid
正四面體
多平面鏡反射成像
椭圆内反射
Discover Topics
Arithmetic
Parametric Curves
Subtraction
Division
LCM and GCD