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同心圓和線段-3(線段到最外圓有小圓)
Author:
jessice
GeoGebra
New Resources
兩位數加法
sanjiaohanshu
四邉形 (四年級) 教師版
三位數除以一位數（二）
拼砌四邊形
Discover Resources
waaachen
Sequence指令練習(包絡線：拋物線)
證平行四邊形 (對角相等)
拋物線軌跡(1)
填色問題(封閉圖形)
Discover Topics
Random Experiments
Standard Deviation
Differential Equation
Surface
Triangles