![[https]](/wiki/imgs/https.png)
직교좌표 공간,space(유클리드_공간,Euclidean_space) 안에서 점,point $\displaystyle (a,b,c)$ 을 중심,center으로 하고 반지름,radius이 $\displaystyle r$ 인 구(sphere)의 방정식,equation은
$\displaystyle (x-a)^2+(y-b)^2+(z-c)^2=r^2$
이다.![WpKo: WpKo:](/wiki/imgs/interwiki/wpko-16.png)
![MathWorld: MathWorld:](/wiki/imgs/interwiki/mathworld-16.png)
![WpSp: WpSp:](/wiki/imgs/interwiki/wpsp-16.png)
![WpEn: WpEn:](/wiki/imgs/interwiki/wpen-16.png)
![WpJa: WpJa:](/wiki/imgs/interwiki/wpja-16.png)
Cmp: 원,circle ... 차원,dimension에 따라 명칭이 달라짐: 원은 2D, 구는 3D, hypersphere는 nD ... (둘 다 한 점,point을 기준으로 거리,distance가(=반지름,radius이) 같은 점들의 집합)
Cmp: 공,ball
Cmp: 공,ball
Extension? Generalization? : hypersphere 하이퍼구(면) or 초구(면)
hypersphere
hypersphere
hypersphere
hypersphere
Hyperphere ?
![KmsE: KmsE:](/wiki/imgs/interwiki/kmse-16.png)
![NdEn: NdEn:](/wiki/imgs/interwiki/nden-16.png)
![Ndict: Ndict:](/wiki/imgs/interwiki/ndict-16.png)
![Ggl: Ggl:](/wiki/imgs/interwiki/ggl-16.png)
![MathWorld: MathWorld:](/wiki/imgs/interwiki/mathworld-16.png)
spherical_geometry spherical_geometry
spherical_geometry = https://en.wiktionary.org/wiki/spherical_geometry
spherical geometry
"spherical geometry"
spherical geometry
spherical geometry
spherical_coordinate spherical_coordinate
spherical_coordinate x 2023-11-05 ... https://en.wiktionary.org/wiki/spherical_coordinates 는 있음...
spherical coordinate
"spherical coordinate"
spherical coordinate
spherical coordinate
spherical_coordinate_system spherical_coordinate_system
spherical_coordinate_system
spherical_
![WtEn: WtEn:](/wiki/imgs/interwiki/wten-16.png)
spherical geometry
"spherical geometry"
![Ndict: Ndict:](/wiki/imgs/interwiki/ndict-16.png)
![Ggl: Ggl:](/wiki/imgs/interwiki/ggl-16.png)
![WtEn: WtEn:](/wiki/imgs/interwiki/wten-16.png)
spherical coordinate
"spherical coordinate"
![Ndict: Ndict:](/wiki/imgs/interwiki/ndict-16.png)
![Ggl: Ggl:](/wiki/imgs/interwiki/ggl-16.png)
![WtEn: WtEn:](/wiki/imgs/interwiki/wten-16.png)
spherical coordinate system
https://ko.wikipedia.org/wiki/구면좌표계
https://en.wikipedia.org/wiki/Spherical_coordinate_system
https://simple.wikipedia.org/wiki/Spherical_coordinate_system
https://ja.wikipedia.org/wiki/球面座標系
spherical coordinate system
spherical coordinate system
spherical_https://ko.wikipedia.org/wiki/구면좌표계
https://en.wikipedia.org/wiki/Spherical_coordinate_system
https://simple.wikipedia.org/wiki/Spherical_coordinate_system
https://ja.wikipedia.org/wiki/球面座標系
![Ndict: Ndict:](/wiki/imgs/interwiki/ndict-16.png)
![Ggl: Ggl:](/wiki/imgs/interwiki/ggl-16.png)
spherical_
![KmsE: KmsE:](/wiki/imgs/interwiki/kmse-16.png)
Up: 껍질,shell
껍질뿐 아니라 내부까지 포함하면, 공,ball.