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Author:
ken cheng
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
算柱 (兩位數)
兩組對邊相等的四邊形
錐體建築師
Discover Resources
Equality of Ratios
直線的投影量
周界平移
複合棒形圖
高次方程的一阶导数范例
Discover Topics
Natural Numbers
Vectors 2D (Two-Dimensional)
Conic Sections
Solids or 3D Shapes
Quadrilaterals