math

Knowing the points A(1, 6), B(−5, −2), C(−1, −5), and D(5, 3), and that segment AB is parallel to segment CD, what is the length of segment AB and segment CD comma and do points A, B, C, and D form a parallelogram? Hint: To prove these points form a parallelogram, segment AB and segment CD must be equal in lengt