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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
三位數除以一位數（一）
画直线等分三角形的面积
畫出對稱圖形
判斷球體
兩位數除以一位數（二）
Discover Resources
對數圖形的平移
pictures
與三個半圓相切的圓不規則區域著色
Similar Triangles
三角函數的由來
Discover Topics
Random Experiments
Upper and Lower Sum or Riemann Sum
Subtraction
Interest Calculation
Polynomial Functions