Answer:
The scale factor is 1.
Step-by-step explanation:
Let k be the scale factor of a dilation of triangle ABC to form the image triangle A'B'C'.
The dilation is a magnification if
[tex] |k| > 1[/tex]
In this case, the preimage will be similar to the image triangle.
If
[tex] - 1\: < \: k \: < \: 0 \: \: or \: \: 0 \: < \: k \: < \: 1[/tex]
the dilation is a reduction. The image and pre-image will still be similar.
But if
[tex]k = 1[/tex]
the image is the same as the preimage.
We say the pre-image is congruent to the image triangle.
