Предмет: Математика, автор: ravilarslanov142

Помогите срочно незнаю вобще 1 задание

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Автор ответа: nuwka81

0

1)периметр:каждый член умножить на 2.

7,6<2а<8,1

13,2<2в<13,6

сложим почленно

20,8<2а+2в<21,7

найдем площадь

3,8*6,6<S<4,1*6,8

25,08<S<27,88

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