PLEASE HELP ME/ AB = 4x
DC = x + 12
AD = 6
BC = 3y
Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show that quadrilateral ABCD is a parallelogram by finding the lengths of the opposite side pairs.
A)	6, 3	
B)	9, 6	
C)	16, 6	
D)	16, 9	
                                             
                                          
                                          
                                       