Complete the proof to show that abcd is a parallelogram. the slope of it is and because the therefore, abcd is a parallelogram because
a. both pairs of opposite sides are parallel.
b. lengths of consecutive sides are not equal
c. slopes of opposite sides are equal
d. lengths of opposite sides are equal
d. slopes of consecutive sides are not equal

a)Slopes of opposite sides are equal

b)Length of opposite sides are equal.

Step-by-step explanation:

By definition of a parallelogram we have

A quadrilateral whose opposite sides are parallel and equal in length. Thus the answer should be ABCD is a parallelogram as the slope of both pair of it's opposite sides are equal and because the lengths of the opposite sides are equal.