Proving Parallelograms

Graph Quadrilateral ABCD with coordinates A(2,4), B(7,6), C(9,4), and D(4,2).
If a quadrilateral has 2 pairs of parallel sides, it is a parallelogram
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
Graph Quadrilateral ABCD with coordinates A(0,-3), B(5,0), C(7,-1), and D(2,-4).
On any quadrilateral, if the opposite sides are congruent, then it is a parallelogram.
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
Graph Quadrilateral ABCD with coordinates A(-3,5), B(0,6), C(4,2), and D(1,1)
On any quadrilateral, if the opposite angles are congruent, then it is a parallelogram.
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
On any quadrilateral, if the adjacent angles are supplementary, then it is a parallelogram.
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
Graph Quadrilateral ABCD with coordinates A(-5,3), B(3,4), C(4,2), and D(-4,1)
On any quadrilateral, if one pair of opposite sides are parallel AND congruent, then it is a parallelogram.
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
Graph Quadrilateral ABCD with coordinates A(1,-1), B(4,1), C(8,-5), and D(5,-7)
On any quadrilateral, if the diagonals bisect each other, then it is a parallelogram.
Using this criteria, is ABCD graphed above a paralleogram? SHOW YOUR WORK!
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– MrCarmack

Information: Proving Parallelograms