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平行四邊形面積
Author:
maths_p5
GeoGebra
New Resources
比較五件物件的重量
第八周作业2
异形操场
撒针估算面积实验
百分數及其應用
Discover Resources
三角形外心
直角梯形
三角錐(旋轉，實體、透視)
三个角只有一个角度数变1
My First GGBBook
Discover Topics
Angles
Coordinates
Scalene Triangles
Geometric Distribution
Division