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橢圓軌跡_過圓內一點與圓內切
Author:
Wu Xiao-Ren
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
【案例】2018年全国1卷理科12题
找出對稱軸
球体的体积推导（优化版）
Discover Resources
優良作品2(怡雯)
area
Sine Wave 3D
x²+y²+z²的取值范围
基础知识
Discover Topics
Prism
Straight Lines
Incircle or Inscribed Circle
Mode
Sequences and Series