# Differential Element dA

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Integration over the region in the plane between the graphs of two continuous functions is performed by setting up type I or type II domains in Cartesian coordinates or as a polar domain in polar coordinates. Double integrals require a student to visualize the differential element of area covering the desired domain of integration. Using an integrand function of value 1 everywhere generates a double integral whose value is the area of the domain.

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Contributed by: Harry Bishop (April 2011)

Open content licensed under CC BY-NC-SA

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