Answer:
9
Explanation:
since they're similair then similair sides will be proportional
CB is similair to EF
=
same thing if you try with the hypotenuse AB similair to DE
=
So, if you multiply r (DF) by 3/4 you will get the similair side AC
rx 3/4=12
r= 12÷ 3/4
r=16