Answer:
c. 1.2 cm
Step-by-step explanation:
The corresponding sides of similar triangles are in the same ratio to each other.
[tex]\frac{EF }{DF} = \frac{BC}{AC }[/tex]
[tex]\frac{x }{3.2} = \frac{3.0}{8.0}[/tex]
[tex]x = \frac{3.2\times3.0}{8.0}[/tex]
[tex]x = \frac{9.6}{8.0}[/tex]
x = 1.2 cm
