Предмет: Математика, автор: good1264

Сторона равностороннего треугольника равна 14корней из 3
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Автор ответа: Аноним

Ответ:

В правильном треугольнике биссектриса одновременно является высотой.

h = √a²-(a²/2)=√3a²/4=(a√3)/2 = (14√3*√3)/2 = 21 см.

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Listen. Are the statements true (T) or false (F)?
1 Agatha Christie has sold a million books in English.
2 She grew up in a cramped, poor home.
3 Christie was her first husband's name.
4 She had a job during the First World War.
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Прилагаю текст аудио:
Track five Agatha Christie is one of the world's most famous writers of crime fiction. She wrote more than 80 novels of murder mystery and crime, which have sold more than a billion copies in English, and another billion in more than 100 other languages. Born into a comfortable, pleasant home in England, to a British mother, and an American father, Agatha, had a quiet conventional childhood in the seaside town of Torquay, in the southwest of England. That's the beginning of the First World War in 1914. She married a pilot called Colonel Archibald Christie. During the war, she worked in a hospital and then in a pharmacy. It was in these jobs that she learned a lot about dangerous chemicals and poisons, and later she used this knowledge in her books. She published her first book, The mysterious affair at styles a couple of years after the war. In it, she introduced Hercule Priora, who was to become one of fiction's most famous detectives. Sadly, her marriage to Colonel Christie was unhappy. And in 1926, Agatha Christie was in a real life mystery. When she herself disappeared. Her car was found abandoned, and despite newspaper stories, she was missing for several days. Eventually, she was found in a hotel in the north of England using a false name. She claimed that she had lost her memory because of her mother's death, and the shock that her husband loved another woman. Two years later, she and Colonel Christie were divorced. In 1930, she married an archaeologist Max Malone, who was 14 years younger than she was. They spent a lot of time traveling in Egypt and other eastern countries, and this provided the location for one of her novels, death on the Nile. Agatha Christie said an archaeologist is the best husband any woman can have. The older she gets, the more interested he is in her. Unlike many of her characters, Agatha Christie died naturally of old age in 1976

Сторона равностороннего треугольника равна 14корней из 3 Найдите ее биссектрису

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Сторона равностороннего треугольника равна 14корней из 3
Найдите ее биссектрису