Antipodal point
（重定向自Diametrical opposition）
![Antipodal points on a circle are 180 degrees apart.](/Images/godic/202501/08/Digon_on_circle1021.png")
In mathematics, the antipodal point of a point on the surface of a sphere is the point which is diametrically opposite to it — so situated that a line drawn from the one to the other passes through the center of the sphere and forms a true diameter.
This term applies to opposite points on a circle or any n-sphere.