В треугольнике ABC AC=BC. Внешний угол при вершине B равен 113°. Найдите угол C. - Znanija.Site №29463042

В треугольнике ABC AC=BC. Внешний угол при вершине B равен 113°. Найдите угол C.
- Предмет:
  Математика
- Автор:
  tyson
- 5 лет назад

Ответы 1

∠B = 180°-113° = 67°
△ABC равнобедренный (т. к. AC=BC) ⇒ ∠A=∠B=67°
∠C = 180°-∠A-∠B = 180°-134° = 46°
Ответ: ∠c=46°.
- Автор:
  baby63
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

что такое деясловы?
просто я подзабыла а в учебнике про них не чево не сказано
- Предмет:
  Беларуская мова
- Автор:
  frodo
- 5 лет назад
- Ответов:
  
  2
- Смотреть
5 класс. Заполни таблицу с глаголами.
drink ____ ____
write ____ ____
fall
buy
sleep
know
say
eat
go
take
- Предмет:
  Английский язык
- Автор:
  tank82
- 5 лет назад
- Ответов:
  
  1
- Смотреть
1. By nature all men are alike, but by education widely ... . Do you think ... about it? (different, differently) 2. My teacher taught me ... as he used the latest, most... methods of teaching, (effective, effectively) 3. Men talk ..., but live ... . Even ... men make ... mistakes, (wise, wisely, foolish, foolishly) 4. The children's presentation was very ... . The events developed ... . (dynamic, dynamically) 5. Life is too ... to learn more than one business well. They returned ... afterwards, (short, shortly) 6. — Act ... and go ... . — But I am neither ... nor ... . (honest, honestly, bold, boldly) 7. She is walking so ... . How ... this ballerina is! (graceful, gracefully) 8. — We must have a ... talk. — Is it so necessary to discuss all this ... ? (confidential, confidentially) 9. His name can be ... seen in many papers. What's the ... news? (current, currently) 10. — Charles and Diana were very ... matched. — Yes, it was a ... match from start to finish, (bad, badly) 11. Make haste ... . He is as ... as a snail, (slow, slowly) 12. Computers have ... made a difference in our lives. She is ... to arrive on time, (sure, surely) 13. On the new stereo, many of the records sounded ... . This time we shall do it ... . (different, differently) 14. The age difference between the brothers is really quite ... . Her husband was ... shorter than she was. (slight, slightly) 15. She paused ... . Landing on the moon was one of the most ... scientific adventures of the twentieth century, (dramatic, dramatically)
- Предмет:
  Английский язык
- Автор:
  jellynv7n
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Помогите пожалуйста с математикой
____________________
Длинна- 6 м
Ширина- ?,2/3 от длинны
Высота- ?, 0,6 от ширины
Нужно найти площадь и объём
- Предмет:
  Математика
- Автор:
  renatoluna
- 5 лет назад
- Ответов:
  
  1
- Смотреть

How much to ban the user?

1 hour 1 day 100 years