1.	Which of the following does not guarantee that a quadrilateral is a parallelogram?
		A.	Both pairs of opposite sides are congruent.
		B.	A pair of consecutive sides are congruent.
		C.	Both pairs of opposite angles are congruent.
		D.	Both pairs of opposite sides are parallel.
		Hint
	2.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 40, y = 50	B.	x = 80, y = 100
		C.	x = 100, y = 80	D.	x = 90, y = 90
		Hint
	3.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 1, y = 1	B.	x = 2, y = 1
		C.	x = 4, y = 2	D.	x = 2, y = 4
		Hint
	4.	The coordinates of the vertices of WXYZ are W(-3, 3), X(6, 6), Y(1, 0), and Z(-5, -2).Determine if WXYZ is a parallelogram. Explain.
		A.	Yes. The two sets of opposite sides are parallel.
		B.	Yes. The two diagonals bisect each other.
		C.	No. is not parallel to .
		D.	No. is not parallel to .
		Hint
	5.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = , y =	B.	x = 4, y =
		C.	x = , y = 4	D.	x = 8, y = 1
		Hint