(AB = 2x), (DC = x + 17), (AD = x + 10), (BC = ?)
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. What is the length of (BC)?
a. 77
b. 1717
c. 2727
d. 34