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 centre of the sphere and forms a true diameter.
This term applies to opposite points on a circle or any n-sphere.
An antipodal point is sometimes called an antipode, a back-formation from the Greek loan word antipodes, which originally meant "opposite the feet."
Read more about Antipodal Point: Theory, Antipodal Pair of Points On A Convex Polygon
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