1.	The quadrilateral below is a parallelogram because_______.
		A.	the diagonals are perpendicular	B.	it is a square
		C.	the diagonals are not congruent	D.	the diagonals bisect each other
		Hint
	2.	Which of the following does not guarantee that a quadrilateral is a parallelogram?
		A.	Both pairs of opposite angles are congruent.
		B.	Both pairs of opposite sides are parallel.
		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 = 80, y = 100	B.	x = 90, y = 90
		C.	x = 100, y = 80	D.	x = 40, y = 50
		Hint
	4.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 2, y = 4	B.	x = 2, y = 1
		C.	x = 4, y = 2	D.	x = 1, y = 1
		Hint
	5.	Which are the coordinates of the vertices of a parallelogram?
		A.	(-2, 1), (-3, 2), (-4, 3), (1, 1)
		B.	(4, 1), (3, 5), (0, -2), (3, 3)
		C.	(-3, 2), (-1, 3), (2, 2), (0, 1)
		D.	(0, 0), (1, 2), (6, 2), (4, 0)
		Hint