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圆在多边形上滚动
Author:
GeoGebra Institute of WuXi
GeoGebra
New Resources
三位數除以一位數（二）
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
球體建築師
柱體建築師
Discover Resources
威力彩開獎機
分數的認識
ghseh 二次函數描點法左右平移-5
P.6 圓周4A
橢圓1--四圓心近似法
Discover Topics
Solids or 3D Shapes
Rectangle
Tangent Function
Surface
Arithmetic Operations