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Автор - alya666615

помогите решить А =81см , В =5/9 от А , А 56 см, В 7/8 от А.Найдите периметр и площадь.

Ответ

Автор - dina24035
1) В= 45 см.
Р= 2*(45+81)= 252 см
S=45*81= 3 645 см²
2) В= 49 см
Р= 2*(49+56)= 210 см
S= 49*56= 2 744 см²

Ответ

Автор - ДарьяМальцева

Ну, В = 45, т.к. 81:9*5=9*5=45

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