Respuesta :
the ratio between the perimeters of two similar polygons is the same as the ratio between the corresponding sides.
12:15=30:x
12x=15*30
12x=450
x=450/12=37.5
37.5 is the answer.
12:15=30:x
12x=15*30
12x=450
x=450/12=37.5
37.5 is the answer.