Предмет: Математика, автор: vikadeduh519

Сторона квадрата 12см.Периметр прямокутника дорівнює периметр квадрата. Знайди площу прямокутника. Якщо одна його сторона 8см.

Ответы

Автор ответа: unezhewaoxnw6u

Ответ:

Пошаговое объяснение:

а(квадрата) - 12см

с(прямоугольника)=8см

S(прямоугольника)-?

Периметр квадрата равен:

Р=4*а=12*4=48см

Периметр квадрата равен периметру прямоугольника

Р(прямоугольника)=(в+с)*2

48=(в+8)*2

2в=48-8*2=32

в=32/2=16см (ширина равна 16см)

S = с × в, где S — площадь; a, в — длина и ширина.

S = 16*8=128см^2

lisahyohyo: Зачем так сложно это 3-4 клас.

unezhewaoxnw6u: Так, именно так считали мои дети в школе.

lisahyohyo: Вы понимаете есть шоклы разных нагрузок если у вас так то это не значит что у всех так.

unezhewaoxnw6u: Ну для начала нужно определить периметр, затем нужно исходя из данных найти 2 стороны, равные межу собой, это банальный х, затем площадь, минимум три действия. Во вторых когда пишешь доходчиво и с формулами, у ребенка есть четкое представление, какая цифра и откуда она взялась. Удачи Вам.
PS! Второй ответ ниже неправильный.

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