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 sides are parallel.
		D.	Both pairs of opposite angles are congruent.
		Hint
	2.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 13, y = 12	B.	x = 16, y = 12
		C.	x = 16, y = 26	D.	x = 12, y = 13
		Hint
	3.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 80, y = 100	B.	x = 40, y = 50
		C.	x = 90, y = 90	D.	x = 100, y = 80
		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 diagonals bisect each other.
		B.	No. is not parallel to .
		C.	No. is not parallel to .
		D.	Yes. The two sets of opposite sides are parallel.
		Hint
	5.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = , y = 4	B.	x = 4, y =
		C.	x = 8, y = 1	D.	x = , y =
		Hint