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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
柱體建築師
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
判斷柱體 8
圓錐展開
立方體和平面的截面
橢圓(左右型)標準式
乘法練習
Discover Topics
Poisson Distribution
Optimization Problems
Logarithm
Special Points
Interest Calculation