Предмет: Геометрия, автор: samkainst

Определи величины острых углов данного треугольника, если ∡ EFR = 142°.

∡ F =
°;

∡ E =
°.​

Приложения:

Ответы

Автор ответа: bearcab
3

Ответ:

∠EFM=38°

∠E=52°

Объяснение:

∠EFM=∠MFR-∠EFR=180°-∠EFR =180°-142°=38°

∠E+∠EFM=90° - как сумма двух острых углов треугольника.

∠E=90°- 38°=52°

samkainst: а F?
bearcab: ∠EFM и есть ∠F=
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Окружающий мир, автор: formula2
тебе понадобятся прозрачные цветные стекла и лист белой бумаги. положи перед собой лист белой бумаги. Посмотри на него сквозь цветные стекла. что происходит? Если убрать цветное стеклышко,то снова видишь белый лист бумаги.
1 год назад
Предмет: Английский язык, автор: cwert
Semester test in writing (7-9th forms)

I. a) Choose the correct variant.

1. Tom usually ... football.

a) is playing b) play с) plays

2. What language he ... now ?

a) speaks b) is speaking c)speak

3. It... snow hard tomorrow.

a) will b) shall c) be

5. Mozart... more than 600 pieces of music.

a) writes b) wrote c) will write

6. ... you have time to write her tomorrow ?

a) do b) did c) will

7. There ... many children in the hall last time.

a) are b) were c) will b

8. I... to London.

a) never was b) have never been c) never were

9. My friends ... to the theatre yesterday.

a) went b) have gone c) had go

10. The children ... outdoors last night when it began to rain hard.

a) were playing b) played c) play

11. Neil Armstrong ... to the Moon many years ago.

a) has gone b) went c) had gone

12. The policeman read the gentleman his wright after he ... him.

a) had arrested b) arrested c) arrests

13. Open the door. The postman ... a letter to you.

a) brings b) has brought c) will bring

14. There ... a lot of beautiful old buildings in Moscow.

a) is b) are c) was

15.Look! Somebody ... in the river.

a) swim b) swims c) is swimming




b) Open the brackets

At seven o’clock I (to go) to the theatre.

What (to do) your brother? – He (to be) a historian.

By the time the firemen (to arrive), the house was burnt down.

I never (to see) snow. I hope to see it when winter (to come).

How long you (to read) this book? – For half an hour.

By the end of the summer we (to complete) the greater part of our task.

He got there sooner than we (to expect).

II. Open the brackets using Conditional I and Conditional II.

1. If you spoke English every day, you (to improve) your language skills.

2.If he (to come) to our house yesterday, he would have met his friend.

3. If he (not to pass) his examination, he will not get a scholarship.

4. I (to be) in a very difficult situation if she did not help me.

5.If my friend (to be) at home, he will tell us what to do.

6.You would not feel so bad if you (not to smoke) too much.

7.If I ( to have) time, I'll go with you
1 год назад
Предмет: Русский язык, автор: efaynb
тихо ум...рали над рекой туманы
1 год назад
Предмет: География, автор: Аноним
Ученикам 7 класса ВОПРОС
Горная система, в которой находится самая высокая вершина мира
8 лет назад
Предмет: Алгебра, автор: Masha110111
упростите вырожение . И пожалуйста распишите как решали . Спасибо!
8 лет назад