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橢圓軌跡
Author:
Ching-Hui Chou
GeoGebra
New Resources
球体的体积推导
畫出對稱圖形
錐體建築師
兩組對邊相等的四邊形
異分母分數減法
Discover Resources
不規則填色
路徑三動畫
反射原理
連連看！橢圓在哪裡？
圓錐截痕
Discover Topics
Standard Deviation
Dilation
Piecewise Functions
Arithmetic
Triangles