What is the scale factor from Figure A to Figure B?

Answer:
Step-by-step explanation:
The figure B is the scaled copy of the figure A.
The both figures are similar to each other.
The scale factor is the ratio of corresponding sides of figure B to A:
or
On figure A sides are.
On figure B sides are.
[tex]\sf\longmapsto k=\dfrac{3}{9}=\dfrac{1.2}{3.6}=\dfrac{1}{3}[/tex]