1.	The quadrilateral below is a parallelogram because_______.
		A.	the diagonals bisect each other
		B.	it has four sides
		C.	both pairs of opposite angles are congruent
		D.	both pairs of opposite sides are congruent
		Hint
	2.	The quadrilateral below is a parallelogram because_______.
		A.	it is a square	B.	the diagonals are not congruent
		C.	the diagonals bisect each other	D.	the diagonals are perpendicular
		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 LMNO is a parallelogram.
		A.	x = 4, y =	B.	x = , y = 4
		C.	x = 8, y = 1	D.	x = , y =
		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.	Yes. and .
		B.	No. is not parallel to .
		C.	No. is not congruent to .
		D.	Yes. and .
		Hint