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В треугольнике АВС АВ>ВС>АС
Найдите угол А,В,С,если известно что один из углов равен 120 градусов, а другой 40 градусов-
Предмет:
Геометрия -
Автор:
bubblegumuklh - 6 лет назад
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Ответы 1
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сумма внутренних углов треугольника =180градусов => 120+40=160 170-160=20 ответ: угол авс=20 градусов
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Автор:
izzylu0i - 6 лет назад
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0
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Помогите корректно перевести текст.
In the 1870s, annual production of rough diamond was well under a million carats. By the 1920s, the figure was around three million carats. Fifty years later, annual production approached 50 million carats, and in the 1990s it surpassed 100 million carats per year.
At the end of the 1970s, the world’s most important rough diamond producers were South Africa, Zaire (now renamed the Democratic Republic of Congo), and the former Soviet Union. In the 1980s, output of higher-quality diamonds from Russia and South Africa remained relatively constant, but Zaire’s production of lower-quality diamonds more than doubled.
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Not everything changed, though. Regardless of the path they take, diamonds still flow from mines through cutting centers, and ultimately to retail customers.
Diamond’s splendor has been appreciated for centuries, but there was not much scientific knowledge about it before the twentieth century. Since then, diamond knowledge has grown steadily, with research by chemists, physicists, geologists, mineralogists, and oceanographers. In the past 50 years alone, scientists have learned a lot about how diamonds form and how they’re transported to the earth’s surface. That knowledge has made it easier to predict locations for new diamond discoveries.
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