1.	The polygon shown is
		A.	a hexagon	B.	concave
		C.	an octagon	D.	regular
		Hint
	2.	The measure of an interior angle of a regular polygon is 160. How many sides does the polygon have?
		A.	18	B.	20
		C.	16	D.	12
		Hint
	3.	An exterior angle of a regular polygon has a measure of 30. Find the sum of the measures of the interior angles.
		A.	1800	B.	2520
		C.	2880	D.	2160
		Hint
	4.	Find the sum of the measures of the interior angles of a 28-gon.
		A.	4680	B.	167
		C.	5040	D.	180
		Hint
	5.	Find the measure of .
		A.	75°	B.	140°
		C.	29°	D.	110°
		Hint