ancho=X
longitud=3x
perimetro= suma de sus 4 lados.
Perimetro=X+3X+X+3X
80=8X
X=80/8 =10
ancho= 10
longitud=30
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ancho=X
longitud=3x
perimetro= suma de sus 4 lados.
Perimetro=X+3X+X+3X
80=8X
X=80/8 =10
ancho= 10
longitud=30