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В правильной четырёхугольной пирамиде боковое ребро равно 22, а тангенс угла между боковой гранью и плоскостью основания равен Найти сторону основания пирамиды.
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sloan - 6 лет назад
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Ответ: 11.
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leo717 - 6 лет назад
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Перевод текста My day. Yesterday it was а very hard day for Dima Yaroslavtsev. Не stood up too late and didn't have his breakfast. Не went to college and remembered that he had eft his pencil-case at home. Besides, he said some unpleasant words to his friends and the Iatter was offended. "Misfortunes never соте alone," thought Andrew when he came home, "the day was spoiled." Не decided to take from his father. Today Dima's father, Sergey Yassilievich got up at а quarter to seven, did his bed. Then he washed himself, brushed his teeth, dressed, and packed his suitcase for work. "Have you brushed your teeth?", he asked his son "Yes, 1 have done it. I'm also ready. Let's go and have breakfast." The day was very good for Dima. Не was in college on time and he was ready to answer any question the teacher asked. Today he had the classes of Mathematics, Russian, English, and Physics. It was very difficult to study because there were many new things. But the textbooks were good, and the tasks were clear. His group mate lgor didn't study maths well at school, so he didn't understand the new material. But the teacher patiently explained, and everybody understood the task . After classes the students went to different hobby groups. Dima is fond of computers, so he went to а programming club. There are ten students in the club besides him. Today the topic was cyces. At home Dima rewrote one of the programs and inserted а cycle there. The program began to work better. Mter the club Dima went home and had dinner. All the family were together, except Father, who was still at the plant. They discussed the events of the day. 98for а walk. When he came back he had supper, got ready for the next day and went to bed. This time he was satisfied with his day and decided to plan it carefully in the future
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