1.	Which figure is not a polygon?
		A.		B.
		C.		D.
		Hint
	2.	The polygon shown is
		A.	an octagon	B.	a hexagon
		C.	concave	D.	regular
		Hint
	3.	What is the measure of an interior angle of a regular 9-gon?
		A.	135	B.	140
		C.	147	D.	144
		Hint
	4.	The measure of an interior angle of a regular polygon is 160. How many sides does the polygon have?
		A.	18	B.	16
		C.	12	D.	20
		Hint
	5.	An exterior angle of a regular polygon has a measure of 30. Find the sum of the measures of the interior angles.
		A.	2520	B.	2160
		C.	2880	D.	1800
		Hint