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area |
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area, measure of the size of a surface region, usually expressed in units that are the square of linear units, e.g., square feet or square meters. In elementary geometry, formulas for the areas of the simple plane figures and the surface areas of simple solids are derived from the linear dimensions of these figures. Examples are given in the table entitled Formulas for Various Areas Formulas for Various Areas
Plane Figures Area1 triangle ab/2 parallelogram ab rectangle ab square s2 circle πr2 Solids Total Surface Area1 ..... Click the link for more information. . The areas of irregular figures, plane or solid, can be computed or closely approximated by the use of integral calculus calculus, branch of mathematics that studies continuously changing quantities. The calculus is characterized by the use of infinite processes, involving passage to a limit —the notion of tending toward, or approaching, an ultimate value. ..... Click the link for more information. . |
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