In △ ABC and △ def, AB / de = BC / EF = AC / DF = = 4, find the ratio of the perimeter of △ ABC to that of △ def Utilization ratio

In △ ABC and △ def, AB / de = BC / EF = AC / DF = = 4, find the ratio of the perimeter of △ ABC to that of △ def Utilization ratio

AB/DE=BC/EF=AC/DF=4,
So AB = 4de, BC = 4ef, AC = 4df
So AB + BC + AC = 4 (de + EF + DF)
So (AB + BC + AC) / (de + EF + DF) = 4
That is, the ratio of the perimeter of △ ABC to that of △ DEF is equal to 4