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 sides are parallel.
		B.	A pair of consecutive sides are congruent.
		C.	Both pairs of opposite angles are congruent.
		D.	Both pairs of opposite sides are congruent.
		Hint
	3.	Which are the coordinates of the vertices of a parallelogram?
		A.	(-3, 2), (-1, 3), (2, 2), (0, 1)
		B.	(-2, 1), (-3, 2), (-4, 3), (1, 1)
		C.	(0, 0), (1, 2), (6, 2), (4, 0)
		D.	(4, 1), (3, 5), (0, -2), (3, 3)
		Hint
	4.	What value of ensures that QRST is a parallelogram?
		A.	63°	B.	37°
		C.	117°	D.	36°
		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.	Yes. and .
		C.	No. is not congruent to .
		D.	No. is not parallel to .
		Hint