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Geometry: Circumference and Area: Pi Anyone?

Circumference and Area: Pi Anyone?GeometryAnatomy of a CircleBasic TermsArcsCircumference and Area: Pi Anyone?TangentsFrom One Theorem Comes Many One of the unusual things about circles is that…

Formulas for Various Areas (table)

(Encyclopedia) Formulas for Various Areas Plane Figures Area1 triangle ab/2 parallelogram ab rectangle ab square s2 circle πr2 Solids Total Surface Area1 right circular cylinder 2πr(r + …

U.S. Cities and Metro Areas: Census 2000

Source: U.S. Census Bureau Overall, cities expanded rapidly during the 1990s, growing nearly twice as fast as in the 1980s. Western and southern cities grew the fastest, while…

Area Codes: United States, Canada, Caribbean

Alabama Area CodesAlaska Area CodesArizona Area CodesArkansas Area CodesCalifornia Area CodesColorado Area CodesConnecticut Area CodesDelaware Area CodesFlorida Area CodesGeorgia Area CodesHawaii…

enterprise zone

(Encyclopedia) enterprise zone, designated geographical district in which resident businesses are legally entitled to receive special benefits from a government, established in economically depressed…

gentrification

(Encyclopedia) gentrification, the rehabilitation and settlement of decaying urban areas by middle- and high-income people. Beginning in the 1970s and 80s, higher-income professionals, drawn by low-…

area

(Encyclopedia) CE5 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,…