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Author:
zhuchenglong
GeoGebra
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撒针估算面积实验
正方形雪花图案
三角函数 的副本
百分數及其應用
双心四边形
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Prism and Cylinder
Temp
面積
Multiplication of Directed Numbers
卓蘭高中
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Quadrilaterals
Probability
Parallelogram
Constructions
Rectangle