1.	OBCD is a square. What are the coordinates of D?
		A.	(0, a)	B.	(a, 2a)
		C.	(a, a)	D.	(0, 0)
		Hint
	2.	Kayla wants to prove that the quadrilateral QRST is a parallelogram. How should she begin proving this in a coordinate proof?
		A.	Find the midpoints of each segment.
		B.	Find the measure of the interior angles of the quadrilateral.
		C.	Draw the diagonals of the quadrilateral.
		D.	Find the slopes of the opposite segments.
		Hint
	3.	Identify the coordinates of Z.
		A.	(-c, a)	B.	(-c, b)
		C.	(-c, -b)	D.	(c, -b)
		Hint
	4.	Find the x-coordinate of R if PQRS is a rectangle.
		A.	2b	B.	a
		C.	b	D.	2a
		Hint
	5.	What are the coordinates of S if PQRS is a rectangle?
		A.	(a, -b)	B.	(-a, b)
		C.	(-a, -b)	D.	(a, b)
		Hint