<u>Angles that are vertical are basically neighbors that are across from each other (numbers across from each other). </u>
Angle <u><CFD</u> would be vertical to <EFA.
39/6= 6.5 then u multiply
6.5 times 4 = 26
which 26 is your answer
Make it a trinomial by using the FOIL method.
First
Inside
Outside
Last