Respuesta :

[tex]\bf side:side\qquad \cfrac{side}{side}\implies \cfrac{5}{5}\implies \cfrac{1}{1}\implies 1:1\impliedby \textit{scale factor}[/tex]

Answer:

The correct option is:  1

Step-by-step explanation:

Scale factor is the ratio of corresponding side lengths of two triangles.

Here....

[tex]\frac{DE}{AB}=\frac{5}{5}=1\\ \\ \frac{DF}{AC}=\frac{5}{5}=1\\ \\ \frac{EF}{BC}=\frac{5}{5}=1[/tex]

So, the scale factor of [tex]\triangle ABC[/tex] to [tex]\triangle DEF[/tex] is 1.