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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
四邊形的特性
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
算柱 (兩位數)
Discover Resources
y=(x-a)²的圖形
歪斜線與三角形面積
Curtate Cycloid
畢氏定理的副本
兩位數除兩位數(例子一)
Discover Topics
Sphere
Quadratic Equations
Subtraction
Equations
Solids or 3D Shapes