Question

3. Если ∆ABC ~ ∆DEF, AB 4 см, ВС = 8 см, DE-3 см тогда
ЕР ...... см.​

Answer 1

 

$\displaystyle\bf\\\Delta ABC \sim \Delta D E F\\\\AB=4~xm\\BC=8~cm\\DE=3~cmk=\frac{AB}{DE}=\frac{4}{3}\\\\\frac{BC}{EF}=k=\frac{4}{3}\\\\\implies~~EF=\frac{3\times BC}{4}=\frac{3\times 8}{4}=\frac{24}{4}=\boxed{\bf6~cm}$