1.	The common endpoint of two rays is called a(n)
		A.	vertex	B.	angle
		C.	side	D.	degree
		Hint
	2.	Use a protractor to measure .
		A.	100	B.	180
		C.	115	D.	65
		Hint
	3.	Classify the given angle.
		A.	right	B.	straight
		C.	obtuse	D.	acute
		Hint
	4.	Classify the given angle.
		A.	obtuse	B.	right
		C.	straight	D.	acute
		Hint
	5.	A mirror reflected a ray of light 145°. Classify the angle of reflection.
		A.	straight	B.	right
		C.	obtuse	D.	acute
		Hint