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椭圆的定义

Author:guomenglin

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兩組對邊相等的四邊形
判斷球體
拼砌四邊形
四邊形的特性
GeoGebra笔记功能体验课件

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判斷柱體 8
太极图
ie 2
奈格爾點與葛爾崗點互為等距共軛點
Arithmetic Series 等差級數

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Isosceles Triangles
Tangent Line or Tangent
Limits
Area
Matrices

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