Here AC is the median of the isoceles trapezoid DEBF. Formula to find the median of a isoceles trapezoid is:
AC=[tex] \frac{EB+DF}{2} [/tex]
Next step is to plug in the values from the diagram in the abov formula. So,
[tex] 5.5=\frac{x+4.4}{2} [/tex]
[tex] 5.5*2=\frac{x+4.4}{2} *2 [/tex] Multiply by 2 to each sides.
11= x+4.4 Simplify.
11-4.4= x Subtract 4.4 from each sides.
So, x=6.6
