высота конуса равна 21, а длина образующей равна 29. Найдите диаметр основания конуса

высота конуса равна 21, а длина образующей равна 29. Найдите диаметр основания конуса
- Предмет:
  Алгебра
- Автор:
  reese20
- 6 лет назад

Ответы 1

Осевое сечение конуса - прямоугольный треугольниквысота - это катетобразующая - гипотенузапо т. ПифагораВторой катет = $\sqrt{29^2-21^2} =20$ - является радиус основании конуса.Диаметр основания в 2раза больше за радиус основания, тоесть $d=2R=2\cdot20=40$ Ответ: 40.
- Автор:
  baby carrotwkr1
- 6 лет назад
- 0
Добавить свой ответ

Еще вопросы

Почему первые гвардейские полки русской армии назывались Преображеновский и Семеновский?
- Предмет:
  История
- Автор:
  yazminrich
- 6 лет назад
- Ответов:
  
  3
- Смотреть
Измини слова так,чтобы они обозначали много предметов: Скворец,конец,огурец,отец,певец,ранец.
- Предмет:
  Русский язык
- Автор:
  wifeytcbq
- 6 лет назад
- Ответов:
  
  2
- Смотреть
Срочно перевидите текст MAGIC MUSTARD 2 часть
The trip was not long. A few minutes later the magic plane was under a big old tree. Sarah was in the middle of the Wild Wood. She didn't know where to go. "How can I get out of here?" she asked. "Can't you find the road?" she suddenly heard a voice. She looked up and down, but couldn't see anybody. There was just an ugly old tree near to where she stood. Then she heard the voice again. " Speak up! I can't hear you! Don't they teach you to speak English at school?" Sarah understood that the tree was talking to her. "Please, sit," said Sarah. "I'm looking for some magic mustard seeds." "The Vinegar Witch may have some, but I'm not sure", said the tree. "The road to the Witch's castle is to the left of the road leading to the magic airport." "Could you repeat that, please?" said Sarah. "That was very difficult to remember." "Certainly not," said the tree. "You, young people, must learn to work without help. Well, hurry up! And he shook his leaves sadly. Sarah went straight ahead. It was difficult to walk because it was dark. She wanted to take a bus , but there were no buses in the Wild Wood. So she had to go on foot. It was a long way. By the time she saw the Witch's house it was already morning. She went up to the castle and saw that the key was in the door. She opened it and went in." Come up here!" she heard a voice from upstairs. She went up and there she saw a large room. In the middle of this room there was a fire burning. In front of the fire there were two armchairs, and in one of them was an ugly old witch. Her friendly black cat, Midnight, was in the other.
- Предмет:
  Английский язык
- Автор:
  wadesweeney
- 6 лет назад
- Ответов:
  
  1
- Смотреть
Решите задачу с помощью уравнения.
В понедельник Миша прочитал 2/9 книги, во вторник 6/7 остатка, а в среду- остальные 5 страниц. Сколько страниц Миша прочитал во вторник?
- Предмет:
  Математика
- Автор:
  frank253
- 6 лет назад
- Ответов:
  
  1
- Смотреть

высота конуса равна 21, а длина образующей равна 29. Найдите диаметр основания конуса

Ответы 1

Топ пользователей