Предмет: Математика, автор: it27

Периметр прямоугольника 36 см . Сумма длин трёх его сторон 25 см . Чему равна площадь этого прямоугольника?

Ответы

Автор ответа: CVita

36-25=11 см - длина четвертой стороны
25-11=14 см - длина двух сторон
14:2=7 см - ширина прямоугольника
11*7=77 см² - площадь

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