Предмет: Математика, автор: vladmirny12351234123

Периметры прямоугольника и квадрата равны. Ширина прямоугольника равна
14 см, и она на 1 дм меньше длины. Найдите площади прямоугольника и квадрата.
Ответ выразите в см2

Ответы

Автор ответа: Kalina11

Ответ: S прямоуг. = 56 кв.см

S квадрата = 121 кв.см

Пошаговое объяснение:

a = 14 см

b = 14 - 10 см = 4 см

S прямоуг. = 14 * 4 = 56 кв.см

P прямоуг = 2* 14 + 2*4 = 28+16 = 44 см

d - страна квадрата = 44/4 = 11 см

S квадрата = 11*11 = 121 кв.см

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