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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
球體建築師
第八周作业
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
Discover Resources
Polygon Activity
特製的門
[問題] OP 最大投影長
LinearProgramming
圓周率的應用 題B
Discover Topics
Linear Regression
Planes
Definite Integral
Mode
Vectors 3D (Three-Dimensional)