1.	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
	2.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 1, y = 1	B.	x = 2, y = 4
		C.	x = 4, y = 2	D.	x = 2, y = 1
		Hint
	3.	What value of ensures that QRST is a parallelogram?
		A.	63°	B.	37°
		C.	117°	D.	36°
		Hint
	4.	Find the values of x. and y that ensure that LMNO is a parallelogram.
		A.	x = , y =	B.	x = 8, y = 1
		C.	x = , y = 4	D.	x = 4, 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.	Yes. and .
		D.	No. is not congruent to .
		Hint