1.	The quadrilateral below is a parallelogram because_______.
		A.	it has four sides
		B.	both pairs of opposite sides are congruent
		C.	the diagonals bisect each other
		D.	both pairs of opposite angles are congruent
		Hint
	2.	Which of the following does not guarantee that a quadrilateral is a parallelogram?
		A.	Both pairs of opposite sides are parallel.
		B.	Both pairs of opposite angles are congruent.
		C.	Both pairs of opposite sides are congruent.
		D.	A pair of consecutive sides are congruent.
		Hint
	3.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 13, y = 12	B.	x = 16, y = 26
		C.	x = 12, y = 13	D.	x = 16, y = 12
		Hint
	4.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 2, y = 1	B.	x = 2, y = 4
		C.	x = 1, y = 1	D.	x = 4, y = 2
		Hint
	5.	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