1.	The quadrilateral below is a parallelogram because_______.
		A.	both pairs of opposite angles are congruent
		B.	it has four sides
		C.	the diagonals bisect each other
		D.	both pairs of opposite sides are 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 = 16, y = 12
		C.	x = 12, y = 13	D.	x = 16, y = 26
		Hint
	3.	Find the values of x and y that ensure that the quadrilateral is a parallelogram.
		A.	x = 1, y = 1	B.	x = 2, y = 1
		C.	x = 2, y = 4	D.	x = 4, y = 2
		Hint
	4.	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.	Yes. The two diagonals bisect each other.
		D.	No. is not parallel to .
		Hint
	5.	What value of ensures that QRST is a parallelogram?
		A.	117°	B.	63°
		C.	37°	D.	36°
		Hint