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圓錐展開圖
Author:
李春培
GeoGebra
New Resources
圓周公式的應用
圓的切線方程
三位數除以一位數（二）
垂直線的斜率
画直线等分三角形的面积
Discover Resources
My GGB Book
vectore_four stack pile
Locus (Parallel)
Mathematics and Optics (and their applications)
数一数
Choikou 5階
Discover Topics
Perimeter
Sine
Symmetry
Indefinite Integral
Geometric Mean