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Perimeter is the distance around a two dimensional shape, a measurement of the distance around something; the length of the boundary. A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length.
In geometry, the area enclosed by a circle of radius r is πr 2.Here, the Greek letter π represents the constant ratio of the circumference of any circle to its diameter, approximately equal to 3.14159.
Illustration of a unit circle. The variable t is an angle measure. Animation of the act of unrolling the circumference of a unit circle, a circle with radius of 1. Since C = 2πr, the circumference of a unit circle is 2π.
Puerto Rico [i] (Spanish for 'rich port'; abbreviated PR), [21] officially the Commonwealth of Puerto Rico, [b] [j] is a self-governing Caribbean archipelago and island organized as an unincorporated territory of the United States under the designation of commonwealth.
The World's Billionaires is an annual ranking of people who are billionaires, i.e., they are considered to have a net worth of US$1 billion or more, by the American business magazine Forbes.
Emma Charlotte Duerre Watson (born 15 April 1990) is an English actress. Known for her roles in both blockbusters and independent films, she has received a selection of accolades, including a Young Artist Award and three MTV Movie Awards.
Partition of the Ottoman Empire, dissolution of Austria-Hungary, transfer of German colonies and territories to other countries; Formation of new countries in Europe and the Middle East, such as Poland, Yugoslavia, Weimar Germany, Soviet Russia and Soviet Union, Lithuania, Estonia, Latvia, Austria, Hungary, Czechoslovakia, Turkey, Hejaz, and Yemen
Peru, [e] officially the Republic of Peru, [f] is a country in western South America.It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pacific Ocean.