Answer:
SF = 2/5
Step-by-step explanation:
The side on figure A which has the 10 is between angles with one mark and 2
The side on figure B which has the 4 is between angles with one mark and 2
The scale factor is what we multiply 10 by to get 4
10 * SF = 4
Divide each side by 10
10 * SF /10= 4/1-
SF = 4/10
SF = 2/5
