Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. …

Perimeter is the distance around the outside of a shape. For example, if you walk around the edge of a playground, you're measuring its perimeter. Area is the amount of space inside a shape. …

Khan Academy ... Khan Academy

Greater Los Angeles is the most populous metropolitan area in the U.S. state of California, encompassing five counties in Southern California extending from Ventura County in the west …

By total area (water as well as land), the United States is either slightly larger or smaller than the People's Republic of China, making it the world's third or fourth-largest country. [11] Both …

– Mutations in PINK1 area common cause of early-onset PD;11 however, like -syn, PINK1 is absent in LBs of sporadic PD α cases.12 Some studies showed that PINK1 overexpression …

The Chicago metropolitan area, also called Chicagoland, is the largest metropolitan statistical area in the U.S. state of Illinois and in the Midwest. Encompassing 10,286 square mi (28,120 …

The New York metropolitan area, also called the Tri-State area and sometimes referred to as Greater New York or Metro New York, is the largest metropolitan economy in the world, with a …

California (/ ˌkælɪˈfɔːrniə /) is a state in the Western United States that lies on the Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares an international …

Australia, officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. [N 6] It has a total …