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800 (eight hundred) is the natural number following 799 and preceding 801. It is the sum of four consecutive primes (193 + 197 + 199 + 211). It is a Harshad number, an Achilles number and the area of a square with diagonal 40.
Geography. Urban geography deals both with cities in their larger context and with their internal structure. Cities are estimated to cover about 3% of the land surface of the Earth. Site Downtown Pittsburgh at the confluence of the Monongahela and Allegheny rivers, which flow into the Ohio River
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
Geography is a systematic study of the Earth (other celestial bodies are specified, such as "geography of Mars", or given another name, such as areography in the case of Mars), its features, and phenomena that take place on it.
Africa is the world's second largest and second-most populous continent after Asia. At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth 's land area and 6% of its total surface area. [7] With 1.4 billion people [1] [2] as of 2021, it accounts for about 18% of the world's human population.
Topics of features generally concern geography, history, nature, science, and world culture. The magazine is well known for its distinctive appearance: a thick square-bound glossy format with a yellow rectangular border.
The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably Mexico, do not participate with the NANP.
Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometry, geographical survey, sport, or atmospheric pressure).
The city of Athens (Ancient Greek: Ἀθῆναι, Athênai [a.tʰɛ̂ː.nai̯]; Modern Greek: Αθήναι, Athine [a.ˈθi.ne̞] or, more commonly and in singular, Αθήνα, Athina [a.'θi.na]) during the classical period of ancient Greece (480–323 BC) was the major urban centre of the notable polis of the same name, located in Attica, Greece, leading the Delian League in the ...