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1
椭圆
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几何学/椭圆
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来自维基百科，开放世界的开放书籍
<
Geometry
椭圆
[
编辑
|
编辑源代码
]
椭圆有时被称为椭圆形。椭圆包含两个焦点。从椭圆上的一个点到一个焦点的距离和从同一位置到另一个焦点的距离之和是个常数
类别
:
书：几何学
华夏公益教科书
