Answer:
[tex]scale\ factor=1[/tex]
Step-by-step explanation:
we know that
The scale factor is the ratio of the corresponding sides of the pre-image and the image
so
[tex]scale\ factor=\frac{image}{pre-image}[/tex] ------> equation A
In this problem
If an image of a triangle is congruent to the pre-image
[tex]image=pre-image[/tex] ------> equation B
substitute equation B in equation A
[tex]scale\ factor=\frac{pre-image}{pre-image}[/tex]
[tex]scale\ factor=1[/tex]
