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橢圓軌跡
Author:
Ching-Hui Chou
GeoGebra
New Resources
四邉形 (四年級) 教師版
畫出對稱圖形
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
Copy of Liu Hui's Method of Finding π
squence
外心
垂直線的斜率
畫出對稱圖形
Discover Topics
Addition
Rational Numbers
Matrices
Differential Equation
Perimeter