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David

Darling

quadrature

quadrature in astronomy

In astronomy, quadrature is the configuration when the Moon or a planet lies at angular distance of 90° east or west of the Sun as seen from Earth.

 


quadrature in mathematics

In mathematics, quadrature is the determination of the area of a geometric figure. This may be done in geometric or arithmetic terms.

 


geometric quadrature


Here the task is to construct a square figure of area equal to the given one, and traditionally by ruler and compass alone. The quadrature of the circle cannot be carried out by ruler and compass.

 


arithmetic quadrature


Here the area is to be calculated in numerical terms.