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.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 80, y = 100	B.	x = 40, y = 50
		C.	x = 100, y = 80	D.	x = 90, y = 90
		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.	No. is not parallel to .
		D.	Yes. The two diagonals bisect each other.
		Hint
	4.	What value of ensures that QRST is a parallelogram?
		A.	37°	B.	36°
		C.	117°	D.	63°
		Hint
	5.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = 4, y =	B.	x = , y = 4
		C.	x = , y =	D.	x = 8, y = 1
		Hint