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8x=56
x= 56:8
x= 7
7+3.7+7+3.7=
7+21+7+21 = 56
la longitud mide 21 m el ancho mide 7 m
la formula d perimetro d rectangulo es
Lx2+Lx2= 2.21 + 2.7 =
42+14 = 56