10. As shown in the figure, in isosceles trapezoid $A B C D$, $A B / / D C, \angle D=60^{\circ}, E$ is a point on $A D$, $E F$ $\perp A D$ intersects $B C$ at point $F$. If $A E=C F=2, E F=7 \sqrt{3}$, then the perimeter of trapezoid $A B C D$ is $\qquad$
$43$