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
Famous quotes containing the word point:
“One point in my public life: I did all I could for the reform of the civil service, for the building up of the South, for a sound currency, etc., etc., but I never forgot my party.... I knew that all good measures would suffer if my Administration was followed by the defeat of my party. Result, a great victory in 1880. Executive and legislature both completely Republican.”
—Rutherford Birchard Hayes (1822–1893)