Question 555191
My question is:
Graph the point A(3,2), B(1,-2), C(2, -5), D(4,-1) on the coordinate plane. What kind of quadrilateral is ABCD?  Use math to justify your answer.

I did the graph and it looks like a parrallelagram, but I do not know how to justify this if it is correct.
----------
If AB is parallel to CD and AD parallel to BC, it's a parallelogram.