+A **double integral** extends the idea of an [integral](/wiki/integral) to functions of two variables, gathering infinitesimal pieces over a two-dimensional [region](/wiki/region). This tool in [calculus](/wiki/calculus) helps determine volumes under surfaces, mass of laminas, or total quantities spread across an area.
+## See also
+- [Triple Integral](/wiki/triple_integral)
+- [Line Integral](/wiki/line_integral)
+- [Area](/wiki/area)
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