Предмет: Математика, автор: карная

Дано : прямоугольник , а - 8 дм , в- на 2 см меньше . Найди P и S .

Ответы

Автор ответа: maymr

4

8 дм = 80 см

1) 80 - 2 = 78 см - b

S=ab=80*78=6240 см²

P=(a+b)*2=(80+78)*2=158*2=316 см

Ответ: 316 см; 6240 см²

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Қазақ тiлi, автор: olga2610

Помогите сделать 8 тапсырму,пожалуйста.

1 год назад

Предмет: Другие предметы, автор: floura9991

написать пословицы и поговорки о осени на коми языке и перевести

1 год назад

Предмет: Английский язык, автор: maks234u

*Внимание! Во всех вопросах только один правильный ответ. Fill in the gaps 1. Mrs. Smith is very active for an ____woman. A) elderly B) ancient C) old D) antiqued 2. All people have the right to ______ of opportunity. A) equality B) equalize C) equal D) equally 3. For my boss home exists only in his _______. A) imagine B) imagination C) imaginary D) imaginable 4. My relatives were very ______when I made a career. A) support B) supportive C) supported D) supportable 5. Last week Nick came ____with the flu. A) across B) off C) down D) over 6. The police were called but no _____were made. A) laws B) lists C) points D) arrests 7. He made no _____to apologize. A) fire B) attempt C) bed D) money 8. The more you do now, the ... will be left for tomorrow. A) more B) much C) less D) little 9. Why ... I ask anybody for help, I can do it myself. A) can B) could C) have D) should 10. We began to learn English in 2001 so we ____it for 8 years. A) learn B) have learnt C) were learning D) have been learning 11. What time ____for Bristol? A) does the next bus leave B) will the next bus leave C) is the next bus leave D) did the next bus leave 12. The problem of homeless people ______tomorrow. A) must not be discuss B) must not discuss C) must not be discussed D) must be not discussed 13. I think people ___this problem. A) will be able solve B) will able to solve C) will be able of solve D) will be able to solve 14. Where ____when the taxi arrived? A) did they sit B) were they sitting C) will they sit D) have they been sitting 15. Choose the correct variant «Why hasn’t he locked the car door?» the policeman asked. A) The policeman asked why he hadn’t locked the car door. B) The policeman asked why he hasn’t locked the car door. C) The policeman asked why hasn’t he locked the car door. D) The policeman asked why hadn’t he locked the car door.

1 год назад

Предмет: Математика, автор: Mishyt

Поезд один рейс совершает за 8ч26мин. За сколько времени поезд сделает 14рейсов

7 лет назад

Предмет: Литература, автор: Аноним

Главная мысль произведения Дж. Свифт «Путешествие Гулливера» в страну лилипутию (кратко)

7 лет назад