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gyzel 橢圓的反射
Author:
均一
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（二）
畫出對稱圖形
兩位數除以一位數（二）
球体的体积推导（优化版）
Discover Resources
阿基米德(3,8,8)
z=x^2-y^2
平方數平方數
My First Geogebra Book
旁心
Discover Topics
Arithmetic
Ellipse
Scalene Triangles
Translation
Fractal Geometry