5. As shown in the figure, $\angle B=30^{\circ}, \angle A=60^{\circ}, \angle D=20^{\circ}$, then the degree of $\angle B C D$ (the angle with the arc part in the figure) is
$\qquad$ $\circ$ .
【Analysis】The sum of the interior angles of a quadrilateral is $360^{\circ}$, so the reflex angle $\angle B C D=360^{\circ}-30^{\circ}-20^{\circ}-60^{\circ}=250^{\circ}$