Знайти площу рівнобедреного трикутника у якого бічні сторони дорівнюють 1 метр, а кут між - №14478250

Знайти площу рівнобедреного трикутника у якого бічні сторони дорівнюють 1 метр, а кут між ними 70 градусів.
- Предмет:
  Математика
- Автор:
  sugar75
- 5 лет назад

Ответы 1

S=1/2*a²*sinaS=1/2*1*0,9397≈0,47м²
- Автор:
  koltenlutz
- 5 лет назад
- 0
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Empire State Building
The Empire State Building is a 102-story skyscraper located in Midtown Manhattan, New York City, on Fifth Avenuebetween West 33rd and 34th Streets. It has a roof height of 1,250 feet (381 m), and with its antenna spire included, it stands a total of 1,454 feet (443 m) high. Its name is derived from the nickname for New York, the Empire State. It stood as the world's tallest building for nearly 40 years, from its completion in early 1931 until the topping out of the original World Trade Center's North Tower in late 1970. Following the September 11 attacks in 2001, the Empire State Building was again the tallest building in New York, until One World Trade Center reached a greater height in April 2012. The Empire State Building is currently the fifth-tallest completed skyscraper in the United States and the 25th-tallest in the world. It is also the fifth-tallest freestanding structure in the Americas. When measured by pinnacle height, it is the fourth-tallest building in the United States.
The Empire State Building is generally thought of as an American cultural icon. It is designed in the distinctive Art Deco style and has been named as one of the Seven Wonders of the Modern World by the American Society of Civil Engineers. The building and its street floor interior are designated landmarks of the New York City Landmarks Preservation Commission, and confirmed by the New York City Board of Estimate. It was designated as a National Historic Landmark in 1986. In 2007, it was ranked number one on the AIA's List of America's Favorite Architecture.
The building is owned by the Empire State Realty Trust, of which Anthony Malkin serves as Chairman, CEO and President. In 2010, the Empire State Building underwent a $550 million renovation, with $120 million spent to transform the building into a more energy efficient and eco-friendly structure. The Empire State Building is the tallest Leadership in Energy and Environmental Design (LEED)-certified building in the United States, having received a gold LEED rating in September 2011.
History
The site of the Empire State Building was first developed as the John Thompson Farm in the late 18th century. At the time, a stream ran across the site, emptying into Sunfish Pond, located a block away. Beginning in the late 19th century, the block was occupied by the Waldorf-Astoria Hotel, frequented by The Four Hundred, the social elite of New York.
The limestone for the Empire State Building came from the Empire Mill in Sanders, Indiana which is an unincorporated town adjacent to Bloomington, Indiana. The Empire Mill Land office is near State Road 37 and Old State Road 37 just south of Bloomington. The Bloomington, Bedford, and Oolitic area is known locally as the limestone capital of the world.
Design and construction
The Empire State Building was designed by William F. Lamb from the architectural firm Shreve, Lamb and Harmon, which produced the building drawings in just two weeks, using its earlier designs for the Reynolds Building in Winston-Salem, North Carolina, and the Carew Tower in Cincinnati, Ohio (designed by the architectural firm W. W. Ahlschlager & Associates) as a basis. Every year the staff of the Empire State Building sends a Father's Day card to the staff at the Reynolds Building in Winston-Salem to pay homage to its role as predecessor to the Empire State Building. The building was designed from the top down. The general contractors were The Starrett Brothers and Eken, and the project was financed primarily by John J. Raskob and Pierre S. du Pont. The construction company was chaired by Alfred E. Smith, a former Governor of New York and James Farley's General Builders Supply Corporation supplied the building materials. John W. Bowser was project construction superintendent.
Excavation of the site began on January 22, 1930, and construction on the building itself started symbolically on March 17—St. Patrick's Day—per Al Smith's influence as Empire State, Inc. president. The project involved 3,400 workers, mostly immigrants from Europe, along with hundreds of Mohawk iron workers, many from the Kahnawake reserve near Montreal. According to official accounts, five workers died during the construction.Governor Smith's grandchildren cut the ribbon on May 1, 1931. Lewis Wickes Hine's photography of the construction provides not only invaluable documentation of the construction, but also a glimpse into common day life of workers in that era.
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