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动态三角形
Author:
陈先生
GeoGebra
New Resources
錐體建築師
畫出對稱圖形
球體建築師
兩位數除以一位數（二）
兩組對邊相等的四邊形
Discover Resources
VV圓
錐體建築師 2
兩線段和圓的關係2
Copy of 小數的認識
任意角的三角函数
Discover Topics
Polygons
Arithmetic Operations
General Quadrilateral
Random Variables
Trapezoid