Вопрос школьника по предмету Математика
Периметр прямоугольника 140см.Ширина 25см.Найти площадь прямоугольника.
Ответ учителя по предмету Математика
Ответ:
S=1125см²
Пошаговое объяснение:
Вторая сторона:х
140=2(25+x)
140=50+2x
90=2x
45=x(длина)
S=25×45
S=1125см²
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