1.	The quadrilateral below is a parallelogram because_______.
		A.	both pairs of opposite angles are congruent
		B.	both pairs of opposite sides are congruent
		C.	the diagonals bisect each other
		D.	it has four sides
		Hint
	2.	Which of the following does not guarantee that a quadrilateral is a parallelogram?
		A.	Both pairs of opposite sides are parallel.
		B.	A pair of consecutive sides are congruent.
		C.	Both pairs of opposite sides are congruent.
		D.	Both pairs of opposite angles are congruent.
		Hint
	3.	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.	No. is not parallel to .
		C.	Yes. The two diagonals bisect each other.
		D.	No. is not parallel to .
		Hint
	4.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = , y =	B.	x = , y = 4
		C.	x = 4, y =	D.	x = 8, y = 1
		Hint
	5.	The coordinates of the vertices of the quadrilateral ABCD are A(-1, 1), B(5, 1), C(1, -1), and D(-5, -1). Is ABCD a quadrilateral? Explain.
		A.	No. is not parallel to .
		B.	No. is not congruent to .
		C.	Yes. and .
		D.	Yes. and .
		Hint