1.	The exact circumference of a circle with a radius of 6 is ____.
		A.		B.
		C.	37.7	D.
		Hint
	2.	In the figure below, the diagonals of the square pass through the center of the circle. Find the exact circumference of the circle.
		A.	28	B.
		C.		D.
		Hint
	3.	Refer to circles B and D in the figure below. If BC = 5 and CD = 5, find AE.
		A.	25	B.	10
		C.	20	D.	15
		Hint
	4.	In the figure, ABCD is a square and AC = 22. Find the circumference of the circle to the nearest tenth.
		A.	34.6	B.	24.4
		C.	48.9	D.	69.1
		Hint
	5.	Find the exact circumference of the circle in the figure.
		A.	17	B.	17
		C.	4.25	D.	8.5
		Hint