The scale factor of the dilation of triangle def is three-tenths i.e. 3/10
From the complete question, the corresponding sides are:
DE = 10
D'E' = 3
The scale factor k is then calculated using"
DE * k = D'E'
So, we have:
10* k = 3
Divide both sides by 10
k = 3/10
Hence, the scale factor of the dilation of triangle def is three-tenths i.e. 3/10
Read more about dilation at:
https://brainly.com/question/3457976
#SPJ4