Back قطبية (هندسة) Arabic Pol und Polare German Recta polar Spanish قطب و خط قطبی Persian Pôle et polaire French 極と極線 Japanese Пол и полара Macedonian Poolverwantschap (kegelsnede) Dutch Pol og polare NN Pol og polare NB

Pole and polar

"Polar line" redirects here. For the railway line, see Polar Line.
The polar line q to a point Q with respect to a circle of radius r centered on the point O. The point P is the inversion point of Q; the polar is the line through P that is perpendicular to the line containing O, P and Q.

In geometry, a pole and polar are respectively a point and a line that have a unique reciprocal relationship with respect to a given conic section.

Polar reciprocation in a given circle is the transformation of each point in the plane into its polar line and each line in the plane into its pole.

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