.(Площадь прямоугольника 616 квадратных метра, а его длина 28 квадратных метров. найдите пощадь такого квадрата, у которого периметр равен периметру прямоугольника.).
danchik60
3
26.02.2019 20:50
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2
так как Sпрям=а*в, то найдем а=S/в=616/28=22 м,
Рпрям=2(а+в)=2(22+28)=100 м, а так как Рпрям=Ркв⇒Ркв=100 м, Ркв=4а, а=100/4=25м, Sкв=а², Sкв=25²=625 м²