Which quadrilateral is a trapezoid? quadrilateral a b c d is shown. sides a b and d c are parallel. sides a d and b c have different length measures. angles a and d are right angles. quadrilateral e f g h is shown. sides f e and g h are congruent. angles e and h have different measures. quadrilateral j k l m is shown. sides j k and l m are parallel. sides k l and j m are parallel. quadrilateral n o p q is shown. sides o n and n q are congruent. sides o p and p q are congruent.