1.	Which figure is not a polygon?
		A.		B.
		C.		D.
		Hint
	2.	The polygon shown is
		A.	a hexagon	B.	regular
		C.	concave	D.	an octagon
		Hint
	3.	The measure of an interior angle of a regular polygon is 160. How many sides does the polygon have?
		A.	16	B.	18
		C.	20	D.	12
		Hint
	4.	Find the sum of the measures of the interior angles of a 28-gon.
		A.	167	B.	180
		C.	5040	D.	4680
		Hint
	5.	What is the value of y in the figure?
		A.	111°	B.	56°
		C.	230°	D.	106°
		Hint