1.	The quadrilateral below is a parallelogram because_______.
		A.	the diagonals are perpendicular	B.	the diagonals bisect each other
		C.	it is a square	D.	the diagonals are not 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 = 12, y = 13
		C.	x = 16, y = 12	D.	x = 16, y = 26
		Hint
	3.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 100, y = 80	B.	x = 90, y = 90
		C.	x = 40, y = 50	D.	x = 80, y = 100
		Hint
	4.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = 8, y = 1	B.	x = 4, y =
		C.	x = , y =	D.	x = , y = 4
		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.	Yes. and .
		D.	No. is not congruent to .
		Hint