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橢圓之極偶 / polarity for ellipse
Author:
XIE Yuheng
GeoGebra
New Resources
異分母分數減法
錐體建築師
GeoGebra笔记功能体验课件
球體建築師
兩位數除以一位數（一）
Discover Resources
testtesttesttesttest
分數加法
lower sum for x^2
笛卡兒之心
球表面积的一种特殊推导
Discover Topics
Volume
Linear Equations
Geometric Transformations
Arithmetic Operations
Hyperbola