Figure abcd is a parallelogram. what are the lengths of line segments ab and bc? ab = 4; bc = 16 ab = 4; bc = 8 ab = 10; bc = 20 ab = 10; bc = 28

AB=10, BC=28

3y-y=6+2               and      2x-x=12+4

2y=8                    and  x=16.

y=4                     and          x=16.

AB=3y-2             and        BC=x+12

AB=3(4)-2          and      BC= 16+12=2

the answer is  

a.

4,624π mm2

step-by-step explanation: