Предмет: Геометрия, автор: jdjrjrjjr

ГЕОМЕТРИЯ Дано: ДАВС - прямоугольный, где уголАВС = 90 ; AB = 6, уголACD = 150 Найдите ВС.​

Приложения:

Ответы

Автор ответа: 55555555552187
0

Ответ:

BC= 6\sqrt{3}

Объяснение:

Дано: ΔАВС - прямоугольный,

где ∠АВС = 90 ; AB = 6, ∠ACD = 150

Найдите ВС.​

∠ACD и ∠ABC смежные ⇒∠ABC = 180-∠ACD = 180-150=30°

ΔАВС - прямоугольный, то tg ∠ABC = \frac{AB}{BC} ? подставим известные величины:

tg 30° = \frac{6}{BC} = \frac{1}{\sqrt{3}}⇒ BC= 6\sqrt{3}


55555555552187: отметь короной, плиз, тебе не трудно, а мне приятно, я так старался для тебя!!!
krutyskanika: я хочу понимать геометрию
Похожие вопросы
Предмет: Английский язык, автор: mikealvarrez
Срочно пожалуйста!!! 20 баллов!

Put the verbs in brackets into the correct present form.

1 A: Tortoises ...live... (live) to be very old.
B: I've heard of one which is over a hundred years old.
2 A: Are you still busy?
B: Yes. I ................................(read) this article for an
hour and I still......................................(not/finish).
3 A; More and more people...............................(go) to
university these days. 5 Yes. I think it's a good thing. -
4 A: I .............................(have) a party tonight. Do you
want to come?
B Yes. What time does it start?
5 A. Why are your shoes wet?
B: I ......................................................(wash) the car.
6 A: What's the matter?
B: I..................................................(break) my ankle.
7 A What do I need to do next?
B: You .....................................(add) the sugar to the
mixture and you .................................(mix) it well.
8 A; Who .................................................(use) my car?
B: I have.
9 A: Are you new here?
B: No. Actually, I .......................(live) here for almost
ten years.
10 A: Pete is playing his music very loud.
B: Again! He....................................(always/do) that!
11 A: Have you made plans for Saturday yet?
B: I...............................(go) to the cinema with Jack.
12 A: Mr Collins is a very good teacher.
B: Well, he ......................................(teach) Maths for
twenty-five years, you know.
13 A: Are you going to the concert on Saturday night?
B: Yes. Actually, I..................................(already/buy)
the tickets.
14 A: Hello, Simon.
B: Oh! We ...................................(always/meet) each
other in this supermarket.

Предмет: Математика, автор: кросавчик5