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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
柱體建築師
畫出對稱圖形
兩組對邊相等的四邊形
算柱 (兩位數)
兩位數除以一位數（一）
Discover Resources
公因數應用題
基本檔
強森定理強森定理
波羅摩及多定理
三節棍
Discover Topics
Exponential Functions
Linear Functions
Translation
Orthocenter
Arithmetic