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椭圆的光学性质
Author:
孟宝兴
GeoGebra
New Resources
找出對稱軸
兩位數除以一位數（二）
画直线等分三角形的面积
GeoGebra笔记功能体验课件
判斷球體
Discover Resources
用數值滑桿控製物件顯示條件
bkb-切割线定理
層層套疊的四邊形
畢氏定理 (勾股定理) <Pythagorean theorem>
平行四边形平移
Discover Topics
Incircle or Inscribed Circle
Function Graph
Square
Isosceles Triangles
Straight Lines