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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
畫出對稱圖形
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
柱體建築師
判斷球體
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格子點問題
Interest（利息）
Copy of 七巧板
rotational symmetry_1
三角函数y=Asin(wx+f)的图像
Discover Topics
Division
Set Theory
Dilation
Rectangle
Difference and Slope