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