Предмет: Математика, автор: Никитос54

Квадрат площадью 36см2 разрезали на 2 прямоугольника. Периметр первого 18см. Найдите площадь второго прямоугольника

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Автор ответа: lirooy08

так как площадь 36 => сторона равна 6см
получается одна сторона прямоугольника =6 и противоположная ей сторона соответственно равна 6
6+6 = 12
так как периметр = 18 см мы вычтем эти две стороны
18-12 = 6
6:2=3 см ( вторая сторона)
6-3 = 3 ( эти прямоугольники равны)
Sпрямоуг. = 3*6 = 18 см^2

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