Предмет: Математика, автор: cetea21

Помогите с задачкой!
В остроугольном треугольнике ABC высоты AA1 и BB1 пересекаются в точке О и величина угла AOB1=60. Найти площадь треугольника ABO, если АА1= 3 см и ВВ1 = 5

(я тут немного набросал)

Приложения:

Ответы

Автор ответа: okneret

Применены : свойство катета против угла в 30 градусов, формула площади треугольника через синус угла

Приложения:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: atashol22893

Переведите следующие предложения, обращая внимание на модальные глаголы. Объясните использование модальных глаголов.

1. The London Eye allows passengers to get on and off without the wheel stopping.

2. The London Eye takes half an hour to make a full turn and can carry 800 passengers at once.

3. Children can have a very special birthday party in a private capsule on the London Eye.

4. The Queen is not allowed to enter the House of Commons, because she is not a commoner!

5. You can have a sleepover at the Science Museum!

6. You must give me, sir, all my own way.

7. What a creature must I be if you could not be abroad with a lady.

8. Must the consequence be crime enough to warrant your jealousy?

9. But before raising the money you must decide how much work you are going to do yourself.

10. You may well be ashamed to see me after your noise and nonsense.

11. She may be the bird for which some wicked fowler will spread his snares.

12. Although if there are two people at odds you may lose a bit because they are not going to get their ideas together.

13. He told me, he says,' I have to kill you because you can identify me.

14. Remember, in an ideal world special forces have to be behind the lines before the first shot is fired.

15. It means we have to make adverts more interesting'.

16. In today's strange old world we have to face up to many unusual things.

17. You may well be ashamed to see me after your noise and nonsense.

18. A compulsion towards philosophical introspection is his chief characteristic, if I may put it like that.

19. It's a way of as a Council taken the position that we ought to be spending your money effectively, right.

20. But I don't think we ought to do this for every course.

7 лет назад

Предмет: Математика, автор: Аноним

знайти найбільше і найменше значення виразу
$3tga \times ctga + 2sin {}^{2} a$

7 лет назад

Предмет: Английский язык, автор: omirovazarina902

9 a) 10.6.1 Fill in: stood,
skin, stiff, butterflies,
sheet. Which idiom can
you see in the picture?
Have you got similar idioms
in your language?
1 Mark went as white as a ... .. when
the wasp landed on his hand.
2 I'm so nervous about the exam; I've got
....... in my stomach!
3 Janet is scared .......
of spiders.
4 Brian nearly jumped out of his
when he saw the mouse.
5 Harry's hair ....... ... on end when he
saw the bear standing in front of him.
b) Make your own sentences using these
idioms. Tell your partner.

7 лет назад

Предмет: Математика, автор: masy0141

За 3 часа работы бригада по
уборке снега очистила 43750м2 дорожного покрытия. За 1 час было убрано 32% этой
площади, а за 2 час 46%оставшейся. Какая

площадь была
очищена за 3 час работы?

10 лет назад

Предмет: Биология, автор: Лолита20

Как возникает дрожь?

10 лет назад