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平环
Author:
xu yan
GeoGebra
New Resources
三位數除以一位數（一）
三位數除以一位數（二）
近似值：有效數字
四邉形 (四年級) 教師版
判斷球體
Discover Resources
Test1
畫三角形 題2d
認識對稱圖形
Solving Triangles (Ambiguous SSA case)
龙形曲线-分形龙
Discover Topics
Stochastic Process or Random Process
Vectors 2D (Two-Dimensional)
Cylinder
Histogram
Normal Distribution