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對摺平行四邊形
Author:
hingchan
GeoGebra
New Resources
异形操场
正方形雪花图案
百分數及其應用
撒针估算面积实验
平行線的判定
Discover Resources
prism
蜘蛛網
Centroid
面積
二面角
Discover Topics
Tree Diagrams
Poisson Distribution
Differential Calculus
Multiplication
Natural Numbers