Question

$△ABC\sim △DEF$ and their perimeters are $32cm$ and $24cm$ respectively. If $AB=10cm$, Find $DE$

Answer 1

$\frac{AB}{DE}=\frac{PerimeterABC}{PerimeterDEF}$

$\frac{10}{DE}=\frac{32}{24}$

$DE=\frac{24\times 10}{32}$

DE = 7.5 cm