1.	The polygon shown is
		A.	a hexagon	B.	concave
		C.	an octagon	D.	regular
		Hint
	2.	What is the measure of an interior angle of a regular 9-gon?
		A.	140	B.	144
		C.	147	D.	135
		Hint
	3.	The measure of an interior angle of a regular polygon is 160. How many sides does the polygon have?
		A.	16	B.	20
		C.	12	D.	18
		Hint
	4.	Find the measure of .
		A.	110°	B.	140°
		C.	29°	D.	75°
		Hint
	5.	What is the value of x in the figure?
		A.	120°	B.	151°
		C.	117°	D.	297°
		Hint