1.	The common endpoint of two rays is called a(n)
		A.	side	B.	vertex
		C.	angle	D.	degree
		Hint
	2.	Use a protractor to measure .
		A.	100	B.	180
		C.	115	D.	65
		Hint
	3.	Classify the given angle.
		A.	straight	B.	acute
		C.	right	D.	obtuse
		Hint
	4.	Classify the given angle.
		A.	straight	B.	obtuse
		C.	right	D.	acute
		Hint
	5.	Classify the given angle.
		A.	acute	B.	right
		C.	obtuse	D.	straight
		Hint