1.	Find the value of x.
		A.	5	B.	0.8
		C.	20	D.	8
		Hint
	2.	In the figure, and are ______.
		A.	secants	B.	tangent segments
		C.	external secant segments	D.	secant segments
		Hint
	3.	Find the value of z.
		A.	15	B.	11
		C.	9	D.	10
		Hint
	4.	Find the value of x.
		A.	4	B.	5
		C.	3	D.	2
		Hint
	5.	Find the value of x.
		A.	7.5	B.	6
		C.	3	D.	12
		Hint