Предмет: Геометрия, автор: Аноним

в основании пирамиды вписанной в конус прямоугольный треугольник с гипотенузой с. Найдите объем конуса,если его образующая наклонена к основани. под углом 60

Ответы

Автор ответа: Pretor

В прямоугольном треугольнике R=c/2

V конуса = 1/3 Sосн. h

Sосн. = πR²=πc²/4

h =c/2×tg60°

Конечная формула:

V конуса = $frac{pi</var><var> c^{3}sqrt{3}}{24}$

Цель задачи вывести эту формулу!

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: kadyralievnakenze

помогите пж пж пж дам 100 баллов пж пж пж пж

6 лет назад

Предмет: Английский язык, автор: landyshtme

Срочно тест по английскому
дам 20 баллов

Ex. 1

1. Every year The Guinness Book of World Records announces ... person in the world.

a) more higher

b) the highest

c) highest

d) highestest

1. I am 1.9 cm ... than you are.

a) tallest

b) more taller

c) tallier

d) taller

2. This chair is ... than the other one.

a) much comfortable

b) many more comfortable

c) very comfortable

d) more comfortable

3. Cindy is ... girl I have ever met.

a) the smartest

b) smatier

c) the most smartest

d) smarter

5. Cars are getting ... as the years go by.

a) the cheapest

b) most cheaper

c) cheaper

d) much more cheaper

6. Jim’s is ... restaurant in our city.

a) the expensiviest

b) the more expensive

c) expensivest

d) the most expensive

7. This is the ... hangover I ever had. I’m never going to drink again.

a) baddest

b) worst

c) best

d) least

8. For ... information do not hesitate to call our assistant.

a) farther

b) furthest

c) fastest

d) further

9. It was ... joke I have ever heard!

a) more funnier

b) the funniest

c) the most funniest

d) funnier

10. In my opinion the tiger is ... animal of all.

a) more dangerous

b) the dangeroustest

c) very dangerous

d) the most dangerous

11. Do you know that dinosaurs were ... than houses?

a) bigger

b) smaller

c) the biggest

d) the smallest

12. I enjoy living in the country. It’s a lot ... than the city.

a) peacefulier

b) many peaceful

c) more peaceful

d) the most peaceful

13. The harder he works ... he becomes.

a) very successful

b) the more successful

c) very much successful

d) the most successful

14. The noise was getting ... until I could not bear it any longer.

a) much more louder and louder

b) loudest and loudest

c) louder and louder

d) the loudest

15. Their car was twice as ... as ours.

a) more expensive

b) expensive

c) expensivie

d) the most expensive

16. My best friend is ... than me.

a) elder

b) older

c) more older

d) the oldest

17. She’s by far ... woman I have ever seen.

a) more beautiful

b) beautifully

c) much beautiful

d) the most beautiful

18. I’ve heard James playing the piano. He doesn’t seem to be getting ... .

a) gooder

b) the best

c) better

d) the goodest

19. My computer is really old. I need something ... .

a) modernier

b) more modern

c) the most best

d) the modernest

20. Chemistry is ... of all subjects.

a) more difficult

b) the most difficult

c) much more difficult

d) difficultiest

Ex.2

1. What’s that noise? It sounds ___.

A) terrible

B) terribly

2. Mike takes care of his health. He does exercises ___.

A) regular

B) regularly

3. There was a ___ change in his behavior.

A) suddenly

B) sudden

4. My sister speaks Italian ___.

A) perfectly

B) perfect

5. The whole city was ___ damaged.

A) seriously

B) serious

6. Peter seemed so ___ yesterday.

A) happily

B) happy

7. See this film if you have a chance. It’s really ___.

A) interestingly

B) interesting

8. The cake was ___ delicious.

A) surprisingly

B) surprising

9. The baby is sleeping ___ at the moment.

A) peaceful

B) peacefully

10. I advise you to book a ___ planned holiday.

A) complete

B) completely

11. My mom is a ___ hair dresser.

A) professional

B) professionally

12. We have an ___ view out of the window.

A) impressively

B) impressive

13. Tim always listens to the teacher ___.

A) attentively

B) attentive

14. When drawing, use ___ pencils.

A) colourfully

B) colourful

15. Dina thinks only about herself. She is so ___.

A) selfishly

B) selfish

16. Sean is a good athlete. He can run very ___.

A) fastly

B) fast

17. I’d like to try on this suit. It looks ___.

A) nice

B) nicely

18. This jigsaw is easy. I can do it ___.

A) quickly

B) quick

19. We all had a ___ time last weekend.

A) merrily

B) merry

20. I can trust Marta. She is a ___ friend.

A) true

B) truly

21. You should answer all the questions ___.

A) honest

B) honestly

22. The problem is ___ difficult. I can’t solve it by myself.

A) extremely

B) extreme

23. Cathy is so ___. She does nothing around the house.

A) lazy

B) lazily

24. Harry was ___ sorry he hadn’t come to the meeting.

A) terrible

B) terribly

25.He got the promotion because he had been working ___ for many years.

A) hardly

B) hard

6 лет назад

Предмет: Математика, автор: milka1092

Прошууу.. Срочно.. Помогите
Площадь поверхности коробки равна 27см^2.найти размеры коробки при максимальном объеме и максимальный объем.

6 лет назад

Предмет: Алгебра, автор: niceinside13

площадь земель крестьянского хозяйства составляет 24га и распределена между зерновыми и овощными культурами в отношении 5:3 сколько гектаров занимают овощные культуры

10 лет назад

Предмет: Алгебра, автор: лина123

Туристы проплыли на лодке от лагерь некоторое расстояние вверх по течению реки, зачем причалили к берегу и, погуляв 3часа, вернулись обратно 6часов от начала путешествия. На какое расстояние от лагерь они отплыли, если скорость течению реки равна 3км/ч, а собственная скорость лодки 9км/ч?

10 лет назад