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数学勾股定理
Author:
xuhao
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
異分母分數減法
錐體建築師
【案例】圆柱体内放置一个大球六个小球
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阿基米德(3,10,10)
向日葵
angle
角平分線性質
折线匀速动点工具
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Constructions
Polygons
Fractal Geometry
Geometric Mean
Probability